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Publications

S. George, C. Mias

Effect of Rolling Temperature on Annealing of aa1050 Aluminium Alloy, Materials Science Forum (2015) Vols.828-829,200-205

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V.N. Vilane, R.D. Knutsen and J.E. Westraadt

Contribution of Hydrogen Promoted Aluminium Partitioning to Tempered ά Martensite Embrittlement in Ti-6Al-4V, Materials Science Forum (2015) Vols.828-829,181-187

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S. D. Yadav, B. Sonderegger, B. Sartory, C. Sommitsch1; C. Poletti1​

Characterisation and quantification of cavities in 9Cr martensitic steel for power plants,Materials Science and technology, Vol 31, 5   (2015), 554-564​

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V.N. Vilane, R.D. Knutsen and J.E. Westraadt

Submicron Grain Size Formation in Thermohydrogenated and Deformed Ti-6Al-4V: The Effect of Processing Route on the Degree of Grain Refinement, Advanced Materials Research (2014) issue 1019, 266-272.

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M.R. Ahmadi, B. Sonderegger, E. Povoden-Karadeniz, A. Falahati, E. Kozeschnik

Precipitate strengthening of non-spherical precipitates extended in 〈100〉 or {100} direction in fcc crystals, Materials Science and Engineering A, Vol 590 (2014) 262–266

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B.Vrancken, V.Cain, R. Knutsen, J. Van Humbeeck

Residual stress via the contour method in compact tension specimens produced via selective laser melting, Scripta Materialia
Vol 87 (2014) 29–32​

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V. Cain, L. Thijsc, J. Van Humbeeck, B. Van Hoorewederd, R. Knutsen

Crack propagation and fracture toughness of Ti6Al4V alloy produced by selective laser melting​., Additive Manufacturing, Vol 5 (2015) 68-75

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K.P. Mabunda and C.I. Lang

The Pt8Zr ordering transformation, Journal of Alloys and Compounds, Vol 613 (2013) 375-378
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C. Mshumi, C.I. Lang, L.R. Richey, K.C. Erbb, C. W. Rosenbrockb,  L. J. Nelson, R. R. Vanfleet, H. T. Stokes, B J. Campbell, G. L.W. Hart​

Revisiting the CuPt3 prototype and the L13 structure, Acta Materialia Vol 73 ( 2014) 326–336 271-274
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M.R. Ahmadia, E. Povoden-Karadeniza, B. Sondereggerd, K.I. Öksüzc, A. Falahatic, E. Kozeschnika

A model for coherency strengthening of large precipitates, Scripta Materialia Vol 84–85 (2014) 47–50
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V. Vilane and R.D. Knutsen

Grain Refinement in Cast Ti-6Al-4V by Hydrogenation, Deformation and Recrystallisation ,Materials Science Forum Vol. 753 (2013) 271-274
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G Leteba, RR Vanfleet and C I Lang

Synthesis of V, Pt and Pt-V nanoparticles, International Journal of Nanoparticles, (2013)
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Tokoloho Rampai, C I Lang and Iakavos Sigalas

Investigation of MAX phase/c-BN composites, Ceramics International
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G Leteba and C I Lang

Synthesis of Bimetallic Platinum nanoparticles for biosensors, Sensors (2013), 13, 10358 - 10369.
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SL George and RD Knutsen

Composition segregation in semi-solid metal cast AA7075 aluminium alloy, Journal of Materials Science 11(2012) 4716–4725.
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M Theron, RD Knutsen, L Ivanchev and H Burger

Effect of heat treatment on the properties of laser-beam welded rheo-cast F357 aluminum, Journal of Materials Processing Technology, v.212 (2012), pp465–470.

G Corbel, M Topic, A Gibaud, C I Lang

Selective dry oxidation of the ordered Pt-11.1 at.% V alloy surface evidenced by in-situ temperature-controlled X-ray diffraction, Journal of Alloys and Compounds, in press, JALCOM-D-11-00552R1.

A Gibaud, M Topic, G Corbel & C Lang

An X-ray scattering study of the Pt1-xVx alloys, Journal of Alloys and Compounds 484 (2009) 168–171.
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M. Topic, C.A. Pineda-Vargas, R. Bucher, H.E. du Plessis, B. Breedt, V. Pischedda, S. Nxumalo, C.I. Lang

High Temperature Study on Thin Aluminium Coatings Deposited onto Thick Platinum Substrates, Surface & Coatings Technology 203 (2009) 3044-3048.
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EP Masuku, R D Knutsen, H Möller, UA Curle, PC Pistorius, G Govender

The influence of Mn on the tensile properties of SSM-HPDC Al-Cu-Mg-Ag alloy A201, JSAIMM, 2011, v.111, pp.167-171. 
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LA Matthews and R D Knutsen

Microstructure evolution in Ti-6Al-4V alloy during hydrogen dosing at elevated temperature, JSAIMM, 2011, v.111, pp.155-158 
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SL George and R D Knutsen

Solidification of an Al-Zn alloy during semi-solid processing, JSAIMM, 2011, v.111, pp.183-186
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AG Buys, V Cain and RD Knutsen

Performance evaluation of aluminium alloy 7075 in tool design for the plastics industry, R&D Journal of the SAIMechE, 26, 1-5 (2010)
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EP Masuku, H Möller, RD Knutsen, L Ivanchev, G Govender

Optimisation of the solution heat treatment of rheo-processed Al-Cu-Mg(Ag) alloys A206 and A201, Materials Science Forum, 618-619, 353-356 (2009)
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R D Knutsen, C Steyn and M Nicol

Building bridges: Linking universities with the manufacturing industry Gateways: International Community Research and Engagement, 2, 144-159 (2009)

R D Knutsen, H. Moller, WE Stumpf and S. Govender

Influence of temper condition on the microstructure and mechanical properties of semi-solid metal processed Al-Si-Mg alloy A356. International Journal of Cast Metals Research, 22 (6), 417-421 (2009)
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LA Matthews and RD Knutsen

Mechanistic study of oxygen deep-case hardening in titanium alloys, In Proceedings of the Microscopy Society of Southern Africa, 39, 62 (2009).

L A Matthews and R D Knutsen

Embrittlement of Ti-6Al-4V alloy by hydrogen dosing at elevated temperature, In Proceedings of the Microscopy Society of Southern Africa, 39, 63 (2009)

S L George and R D Knutsen

Microstructural evolution of a SSM cast aluminium alloy during in situ heating in the SEM, In Proceedings of the Microscopy Society of Southern Africa, 39, 66 (2009).

W Banda, G.A. Georgalli, C.Lang and J.J. Eksteen

Determination of the Phase Transformation Temperatures of the Fe-Co-Cu System in the Fe-Rich corner by Thermal Analysis, Metallurgical and Materials Transactions B 39B, 655-661 (2008).
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P. Bhattacharyya, P.K. Basu, C. Lang, H. Saha and S. Basu

Noble Metal Catalytic Contacts to Sol-gel Nanocrystalline Zinc Oxide Thin Films for Sensing Methane, Sensors & Actuators: B. Chemical 129, 551-557 (2008)
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W. Banda, G.A. Georgalli, C. Lang and J.J. Eksteen

Liquidus temperature determination of the Fe-Co-Cu system in the Fe-rich corner by thermal analysis, Journal of Alloys and Compounds 461, 178-182 (2008)
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S Nxumalo and C I Lang

Dislocations in Pt8V ordered alloys, Electron Microscopy and Analysis Group Conference 2007 (EMAG 2007), Journal of Physics: Conference Series 126 012014 (2008).

C I Lang, D R G Mitchell and S Nxumalo

The ordering transformation in platinum-11 at.% vanadium, Proc. Microscopy Society of Southern Africa 37, 18 (2008).

C Mshumi & C I Lang

Size effects in tensile testing, Proc. Microscopy Society of Southern Africa 37, 22 (2008).

S Parker and R D Knutsen

Analysis of microstructure evolution during Steckel mill rolling of AISI304 stainless steel, ISIJ International, 48 (2), 200-207 (2008)
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G Kunene, G Govender, L Invanchev, RD Knutsen and H Burger

The influence of heat treatments for laser welded semi-solid metal cast A356 alloy on the fracture mode of tensile specimens, In Proc. 10th International Conference on Semi-Solid Processing of Alloys and Composites (S2P 2008), Sept. 2008, Aachen, Germany, Trans Tech Publications,141-143, 169-174 (2008) (peer reviewed).

G Govender, L Ivanchev, H Burger, RD Knutsen and G Kunene

Weldability of SSM Rheo Processed Aluminium Alloy A356, In Proc. 10th International Conference on Semi-Solid Processing of Alloys and Composites (S2P 2008), Sept. 2008, Aachen, Germany, Trans Tech Publications, 141-143, 773-778 (2008) (peer reviewed).

V Cain and R D Knutsen

Influence of grain size and niobium content on the creep resistance of Type 441 ferritic stainless steelI, In Proceedings of the Microscopy Society of Southern Africa, 38, 10 (2008)

S L George and R D Knutsen

Post-solidification homogenisation of AA7075 components formed by semi-solid metal casting, In Proceedings of the Microscopy Society of Southern Africa, 38, 13 (2008)

L A Matthews and R D Knutsen

Influence of thermal oxidation processing on grain structure evolution in a titanium α/β alloy, In Proceedings of the Microscopy Society of Southern Africa, 38, 20 (2008)

J H. O’Connell, J R D Knutsen, H. Neethling and M. Lee

Characterization of polycrystalline SiC using SEM and EBSD, In Proceedings of the Microscopy Society of Southern Africa, 38, 25 (2008)

S Nxumalo , M P Nzula and C I Lang

Order hardening of Pt8X alloys, Materials Science and Engineering: A, 445-446, 336-340 (2007).
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D Miller, K Vuso, P Park-Ross and C I Lang

Welding of platinum jewellery alloys, Platinum Metals Review 51, 23-26 (2007).
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C Mshumi and C I Lang

Strengthening of platinum 5 wt.% copper, Platinum Metals Review 51, 78-82 (2007).
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M Topic, S Nxumalo, R Bucher, C A Pineda-Vargas, V Pischedda and C I Lang

Phase Transformations in Platinum-Aluminium Coatings, Proc. European Materials Research Society Spring Meeting, Grenoble, France, in press, 2007.

R D Knutsen

Correlating microstructural features and surface roughening in ferritic stainless steel, Mat. Sci. Forum, vol. 550, 65-74 (2007)
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A Vahed, N Lachman and R D Knutsen

Failure investigation of soldered stainless steel orthodontic joints exposed to artificial saliva, J. Dental Materials, 23, 855-861 (2007)
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M Carelse and CI Lang

Ordering transformation in a platinum copper jewellery alloy, Proc. Microscopy Society of southern Africa, 35, 5 (2005)
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S Nxumalo and CI Lang

A study of the thermodynamic stability of the Pt8V ordered phase, Proc. Microscopy Society of southern Africa 3, 6 (2005).

S. Nxumalo and C.I. Lang
A study of equilibrium in the platinum-chromium system, Proc. Microscopy Society of Southern Africa, Pretoria, South Africa 34, 16 (2004).

M. Carelse, K. Jackson and C.I. Lang

A heat treatable copper alloy for jewellery applications, Proc. Microscopy Society of Southern Africa, Pretoria, South Africa 34 ,17 (2004).

M.P. Nzula and C.I. Lang

Order-hardening in platinum 10 at. % chromium, Proc. Microscopy Society of Southern Africa, Pretoria, South Africa 34,18 (2004).

M.P. Nzula, C.I. Lang and D.J.H. Cockayne

The Study of the Formation of Pt8Cr in the Platinum-rich Portion of the Pt-Cr Binary, Proceedings of Microscopy and Microanalysis 2003, San Antonio, TX 9 (suppl2), 592 (2003).

T. Keraan and C.I. Lang

High temperature investigation into platinum-base superalloys, Proc. Microscopy Society of Southern Africa, Cape Town, South Africa 33,16 (2003).

W. Banda, C.I. Lang, J.J. Eksteen and L. Lorenzen

Evaluation of the Fe-Rich corner of the Fe-Co-Cu alloy system. Proc. Microscopy Society of Southern Africa, Cape Town, South Africa 3, 14 (2003)

M.P. Nzula and C.I. Lang

TEM analysis of platinum 10 at.% chromium, Proc. Microscopy Society of Southern Africa, Johannesburg, South Africa 31,16 (2001)

T.P. Shale and C.I. Lang

SEM analysis of sintered polycrystalline diamond, Proc. Microscopy Society of Southern Africa, Johannesburg, South Africa 31,16 (2001)

S Nxumalo and C I Lang

Dislocations in ordered Pt 11 at.% V, Proc. Microscopy Society of Southern Africa, 36, 13 (2006).

C Mshumi and C I Lang

Order harding of Pt 5 wt.% Cu, Proc. Microscopy Society of Southern Africa, 36,10 (2006).

PS Bate, R D Knutsen, I Brough and FJ Humphreys

The characterisation of low angle-angle boundaries by EBSD, J. Microscopy, 220 (1), 36-46 (2005)
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R D Knutsen

Orientation clustering in ferritic stainless steel, In Proceedings of the Microscopy Society of Southern Africa, 36,17 (2006)

S L George and R D Knutsen

Evaluation of the stress relaxation technique for measuring softening kinetics in aluminium alloys, In Proceedings of the Microscopy Society of Southern Africa, 36, 16 (2006)

M. Carelse and C.I. Lang

Order hardening in platinum 14 at.% copper, Scripta Materialia 54 1131-1315 (2006)
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K.M. Jackson and C.I. Lang

Mechanical Properties Data for Pt-5 wt.% Cu and Pt-5 wt.% Ru alloys, Platinum Metals Review 50 (1) 15-19 (2006)
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M.P. Nzula, C.I. Lang and D.J.H. Cockayne

The formation of Pt8Cr in Pt 10 at.% Cr, J. Alloys and Compounds, 420 (1-2) 165-170 (2006)
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S. Nxumalo and C.I. Lang

Thermodynamic stability of Pt8V, J. Alloys and Compounds, J. Alloys and Compounds, 2006, in press.
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PS Bate, RD Knutsen, I Brough and FJ Humphreys

"The characterisation of low angle-angle boundaries by EBSD". J. Microscopy, vol. 220 (1), 2005, pp 36-46.

D. Miller, T. Keraan, P. Park-Ross, V. Husemeyer and C.I. Lang

Casting platinum jewellery alloys: the effects of composition on microstructure, Platinum Metals Review 49 (3) 110-117 (2005)
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D. Miller, T. Keraan, P. Park-Ross, V. Husemeyer, A. Brey, I. Khan and C. I. Lang

Casting platinum jewellery alloys: the effects of casting variables on fill and porosity, Platinum Metals Review 49 (4) 184-182 (2005).
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K.M. Jackson, M.P. Nzula, S. Nxumalo, and C.I. Lang

Mechanical Behavior of a Pt-Cr Jewelry Alloy Hardened by Nano-Sized Ordered Particles, in Integrative and Interdisciplinary Aspects of Intermetallics, ed. M.J. Mills, H. Inui, H. Clemens and C-L. Fu (Mater. Res. Soc. Symp. Proc. 842, Warrendale, PA, 2005) 5.52: 1-6.

D.O. Moumakwa and K. Marcus

Tribology in coal-fired power plants, Tribology International 38(2005) 805-811
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K.Marcus

Tribology based research at UCT: some recent case studies. Tribology International, 38( 2005)pp 843-847
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N.V. Klaas, K. Marcus and C. Kellock

The tribological behaviour of glass filled polytetrafluoroethylene, Tribology International, 38( 2005) Pp 824-833
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J McC Buchanan, RD Knutsen and JA Basson

"Solving for friction effects during mechanical compression testing". SA Mech Eng. (R & D Journal), vol. 20 (2), 2004, pp 3-7.

RD Knutsen, CI Lang and J Basson

"Discontinuous cellular precipitation in a Cr-Mn-N steel with niobium and vanadium additions"
Acta Materialia, 52 (2004) 2407-2417

K Marcus

"Mechanical behaviour of glass and carbon fibre reinforced composites at varying strain rates"
Composite Structures, 2003

S. Roy, C. Jacob, C. Lang and S. Basu

Studies on Ru/3C-SiC Schottky Junctions for High Temperature Hydrogen Sensors, Journal of The Electrochemical Society 150, H135-H139 (2003).

M.P. Nzula, C.I. Lang and D.J.H. Cockayne

The Study of the Formation of Pt8Cr in the Platinum-rich Portion of the Pt-Cr Binary, Proc. Microsc Microanal 9 (suppl2), 592 (2003), Proceedings of Microscopy and Microanalysis 2003, San Antonio, TX.

M.P. Nzula and C.I. Lang

Ordering in platinum-chromium alloys, Proc. ICEM: International Congress on Electron Microscopy, Durban, South Africa (2002).

A Turnbull, ER de los Rios, RB Tait C Laurent and S Bobaid

"Improving the fatigue crack resistance of Waspallloy by shot peening"
Fatigue and Fracture of Engineering Materials and Structures, Vol. 21, 1998, 1513 - 1524
Acta Materialia, vol 50 (2002), pp. 2881-2893

NJ Wittridge and RD Knutsen

"Modelling surface ridging in ferritic stainless steel"
Mat. Sci. Technology, vol 18 (2002), pp. 1279-1285

MP Nzula and CI Lang

"Ordering in platinum-chromium alloys"
Proc. ICEM: International Congress on Electron Microscopy, Durban, South Africa (2002)

PC Taylor and RB Tait

"Effects of fly ash on fatigue and fracture properties of hardened cement mortar"
Cement and Concrete Composites, Vol. 21, 1999, pp 223 - 232
Acta Materialia, vol 49 (2001), pp. 2739-2749

RB Tait and J Press

"An experimental study of the residual stresses, and their alleviation, in tube to tube-sheet welds of industrial boliers"
Engineering Failure Analysis, Vol 8, 2001, pp15-27

RD Knutsen, JA Basson and CN Machio

"The influence of austenite potential on the annealing behaviour of AISI430 ferritic stainless steel"
In Proc. Recrystallisation & Grain Growth, Aachen, Germany, (2001), vol 2, pp. 1161-1166

RD Knutsen, A Duckham and O Engler

"Moderation of recrystallisation texture by nucleation at copper-type shear bands in Al-1Mg"

K Marcus

"An Investigation into the Fracture Behaviour of Ethylene Propylene Impact Copolymers"
4th Annual UNESCO School and IUPAC Conference on Macromolecules and Materials Science, Stellenbosch Univ., 9-11 April, 2001

JA Basson, RD Knutsen and CI Lang

"Twin formation during discontinuous precipitation in an austenitic stainless steel"
In Proc. Recrystallisation - Fundamental Aspects and Relations to Deformation Microstructure, Risoe, Denmark, (2000), pp. 243-249

CI Lang, D Sordelet, M Besser, D Shechtman, FS Biancaniello and EG Gonzalez

"Quasicrystalline Coatings: Thermal evolution of structure and properties"
Journal of Materials Research 15, 1894 (2000)
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RD Knutsen, A Duckham and O Engler

"Influence of deformation variables on the formation of copper-type shear bands in Al-1Mg"

K Marcus

"An Investigation of Composite Compressor Blades"
3rd Int. Conf. On Composite Science and Technology, Durban, South Africa, 2000, pp 129-134

K Marcus

"Finite Element Analysis of Composite Turbine Blades"
Int. Conf. On Applied Mechanics, Durban, South Africa, 2000, pp 97-102

K Marcus

"On Composite Turbine Compressor Blades"
ECCM 9: Composites - From Fundamentals to Exploitation, Brighton, UK, 2000

K Marcus

"Structure-Property Relationhips in Polypropylene Ethylene Impact Copolymers"
3rd Annual UNESCO School and IUPAC Conference on Macromolecules and Materials Science, Stellenbosch Univ., 8-9 April, 2000

C.I. Lang, F.S. Biancaniello, S.D. Ridder, D.J. Sordelet, N.F. Besser & D.Shechtman

Characterization of an Al70,9Cu9Fe10Cr10B0.1 stable quasiperiodic material as a wear resistant thermal spray coating. Proceedings of a symposium, Powder Materials: Current Research and Industrial Practices, The Minerals, Metals & Materials Society (TMS), Cincinnati, Ohio, 327 (1999).

C.I. Lang

Thermophysical properties of aluminium ruthenium alloys. Proc. 1st International Conference on Thermophysical Properties of Materials, Singapore, 441 (1999)

RD Knutsen, FJ Humphreys, SA Court and H-L Yiu

"Cube texture stability after high temperature plane strain compression of a commercial Al-5Mg alloy"
In Proc. RECRYSTALLISATION 99, Tsukuba Science City, Japan, (1999), eds. T Sakai and HG Suzuki, JIM, pp. 209-214

RD Knutsen, FJ Humphreys, PS Bate and SA Court

"Texture stability during high temperature plane strain compression of a commercial Al-Mg alloy"
In Proc. ICOTOM 12, Montreal, Canada, (1999), ed. JA Szpunar, vol 1, pp. 617-622

RD Knutsen and NJ Wittridge

"A microtexture based analysis of the surface roughening behaviour of an aluminium alloy during tensile deformation"
Mat. Sci. Eng., vol 269 (1999), pp. 205-216

CI Lang, D Shechtman and EG Gonzalez

"Friction and wear properties of quasiperiodic material coatings" Bull. Mater. Sci. 22 (1999)

JA Cotton, RD Knutsen and CI Lang

"The influence of niobium and vanadium on the microstructure and mechanical properties of a high nitrogen stainless steel"
Materials Science Forum 318-320, 271 (1999)

RP Matthews, CI Lang and D Shechtman

"Sliding wear of quasicrystalline coatings"
Tribology Letters 7, 179, (1999)

CI Lang

"Thermophysical properties of aluminium ruthenium alloys"
Proc. 1st International Conference on Thermoyphysical Properties of Materials, Singapore, 441 (1999)

C.I Lang and J. Tapson

Resistometric mapping using a scanning tunneling microscope, MRS Symposium Proceedings 500, 15 (1998).

RD Knutsen and DJ Mills

An investigation of the tribological behaviour of a high nitrogen Cr-Mn austenitic stainless steel" Wear, vol 215 (1998), pp. 83-90

RD Knutsen and A Duckham

Asymmetric flow during plane strain compression testing of aluminium alloys"
Mat. Sci. Eng., vol 256 (1998), pp. 220-226

SA Anderson and CI Lang

"Thermal conductivity of ruthenium aluminide (RuAl)"
Scripta Materialia 38, 493 (1998)

K Marcus

"An Invesitigation of Erosive the Erosive Behaviour of Fibre-Reinforced Composite Materials"
Electron Micr. Soc. of Southern Africa, 38th Annual Conf., Bloemfontein, 1999, p21

K Marcus

"Use of Electron Microscopy to Investigate the Structure of Poly (Propylene-Ethylene) Impact Copolymers"
Electron Micr. Soc. of Southern Africa, 38th Annual Conf., Bloemfontein, 1999, p9

K Marcus

"Composite Turbine Compressor Blades"
Proc. 2nd Int. Conf. On Composites at Lake Louise, Session R-Mechanical Properties of Composites, Lake Louise, Canada, 1999

K Marcus

"The Effect of Strain Rate on the Fibre Failure Modes for Polymer Matrix Composites"
Electron Micr. Soc. of Southern Africa, 40th Annual Conf., Vol 31, Johannesburg, 2001, p15

K Marcus, K Sole, and R Patil

"An Investigation into the Fracture Behaviour of Ethylene Propylene Impact Copolymers, Polymer Characterization and Materials Science"
Macromolecular Symposia, R D Sanderson and H Pasch (eds), Wiley-VCH, ISBN 3-527-30468-1, 2002

R Patil, K Marcus and B Sole

"An Investigation into the Fracture Behaviour of Poly (Propylene-Ethylene) Copolymers"
Journees D'Etudes Sur Les Polymeres, Boumerdes, Algeria, April 2002, CD ISSN 112-3788

R Ochola, K Marcus, G Nurick, and T Franz

"Modelling damage of Polymer Matrix Composites at various Strain Rates"
Composites Africa, Johannesburg, August, 2002

PATENTS

S. Nxumalo and C.I. Lang

Hardening of metal alloys, PCT Patent WO 2006/024928 A1 (2006).

S. Nxumalo and C.I. Lang

South African Patent No. 2004/6994. Hardening of low solute content platinum alloys by heat treatment (2004).

N. Towle, C.I. Lang and D. Miller

South African Patent No. 99/7376. Hardening of low solute content platinum alloys (1999).