Indian Institute of Metals

Salt Lake, India

Indian Institute of Metals

Salt Lake, India

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News Article | August 22, 2016
Site: www.materialstoday.com

The recipient of the 2017 Acta Materialia Gold Medal is Dr. John J. Jonas, Henry Birks Professor Emeritus, Department of Mining and Materials Engineering, McGill University, Montreal, Canada.   Dr. Jonas was born in Montreal and graduated from McGill University with a bachelor’s degree in Metallurgical Engineering in 1954.  After working for one year at the Steel Company of Wales in Port Talbot, he attended Cambridge University on an Athlone Fellowship and received a Ph.D. degree in Mechanical Sciences in 1960.  On returning to Montreal, he began teaching “mechanical metallurgy” at McGill and built up a research laboratory that includes a number of specialized testing machines and is particularly well equipped for experimental investigations in the field of high temperature deformation. Professor Jonas’ most important scientific contributions are related to determining what happens to sheet steel when it is red hot and flying through a rolling mill at 100 km/hr. The basic phenomena involved include dynamic and post-dynamic recrystallization, dynamic transformation and retransformation, and the dynamic and strain-induced precipitation of carbonitrides.  He and his co-workers have made seminal contributions to all three of these areas of research.  An important related innovation was establishment of the laboratory method of determining the T  (temperature of no-recrystallization) during rolling, a procedure that is now employed in rolling mills worldwide.  This work has resulted in major improvements in the understanding and control of the microstructural changes taking place during steel processing and has led to more accurate computer models for the control of industrial rolling mills. In addition to his research in ferrous metallurgy, Professor Jonas has made numerous contributions to the understanding of the deformation behavior of non-ferrous metals. These have included explanations of variant selection of twins in Mg and Ti, of the causes of plastic instability and flow localization during metal forming, and of texture development during deformation, annealing and phase transformation. He has received numerous awards for this work, including the Réaumur and Gold Medals of the French Metallurgical Society, the Hatchett Medal of the Metals Society (U.K.), the Airey, Dofasco and Alcan Awards of the Canadian Institute of Mining and Metallurgy, the Gold Medal of the Canadian Metal Physics Association, the NSERC Award of Excellence, the Killam Prize for Engineering, the Michael Tenenbaum Award of the American Institute of Metallurgical Engineers, the Hunt Silver Medal of the US Iron and Steel Society, the Barrett Silver Medal and G. Macdonald Young Award of the American Society for Metals, the Alexander von Humboldt Research Award (Germany), and the Yukawa Silver Medal and two Sawamura Bronze Medals of the Iron and Steel Institute of Japan. Professor Jonas has been elected a Fellow of the American Society for Metals, Royal Society of Canada, Canadian Academy of Engineering, Canadian Institute of Mining and Metallurgy, and Hungarian Academy of Sciences.  He is an Honorary Member of the Iron and Steel Institute of Japan and of the Indian Institute of Metals.  He was made an Officer of the Order of Canada in 1993, a Chevalier of the Order of Quebec in 2000, and received the Quebec prize for science (Prix du Québec - Marie Victorin) in 1995.  He has served as a visiting professor in numerous countries, including Argentina, Australia, Belgium, Brazil, Britain, China, France, Germany, Holland, Hungary, India, Iran, Israel, Japan, Mexico, South Africa, South Korea, Spain, Taiwan, the USA and the USSR. In 1985, Dr. Jonas was appointed to the CSIRA/NSERC Chair of Steel Processing at McGill, a position which was funded jointly by the Canadian Steel Industry Research Association and the Natural Sciences and Engineering Research Council of Canada.  In this capacity, he worked closely with the Canadian steel industry, and collaborated in the solution of a number of important processing problems.  He and his colleagues have been granted five sets of international patents associated with steel rolling, three of which have been assigned to the sponsoring companies. He has trained over 200 students and research fellows in the specializations outlined above and he and his students have published more than 800 papers, 100 of them in Acta and Scripta Materialia.  His current h-index (Hirsch number) is 83 and he has more than 25,000 citations to his credit. The Acta Materialia Gold Medal, established in 1972, is awarded annually by the Board of Governors of Acta Materialia, Inc., with partial financial support from Elsevier, Ltd.  Nominees are solicited each year from the Cooperating Societies and Sponsoring Societies of Acta Materialia, Inc., based on demonstrated ability and leadership in materials research.  Dr. Jonas will receive the Gold Medal at the TMS Annual Meeting in San Diego in March 2017.


Gupta K.P.,Indian Institute of Metals
Journal of Phase Equilibria and Diffusion | Year: 2010

The nickel-rhenium-titanium (Ni-Re-Ti) was investigated by a researcher to demonstrate the presence of a single isothermal section and some other aspects. Investigations revealed that the Ni-Re system was a simple peritectic system where solid solution γ formed through a peritectic reaction L + ε 1 ↔ γ at 17.4 at.% Re at the Ni side of the Ni-Re system face centered cubic (fcc). Investigations also revealed that four intermediate phases formed in the three binary systems, such as Ni-Re, Ni-Ti, and Re-Ti. The ternary system Ni-Re-Ti system was investigated using diffusion couples and arc melted alloys. Sandwich diffusion couples Re/Ni/Ti were prepared by welding 50 μm thick Ni between Re and Ti at 902 °C for 10 minutes under 15 MPa pressure. The diffusion zones of the diffusion couples and the annealed alloys were also characterized using scanning electron microscopy (SEM), electron probe microanalysis (EPMA), and x-ray diffraction (XRD).


Gupta K.P.,Indian Institute of Metals
Journal of Phase Equilibria and Diffusion | Year: 2010

The chromium-nickel-zirconium (Cr-Ni-Zr) system for the development of high temperature resistant brazing material was studied. The Cr-Zr system showed the presence of only one intermediate phase Cr 2Zr which occurred in three polymorphic forms, the αCr 2Zr(ψ 1) existed below ~1592 °C, the βCr 2Zr(ψ 1) existed between 1592 and 1622 °C, and the δCr 2Zr(δ 1) existed between 1622 and 1673 °C. The Ni-Zr system had eight intermediate phases that included Ni 5Zr, Ni 7Zr 2, Ni 3Zr, Ni 21Zr 7, Ni 10Zr 7, Ni 11Zr 9, NiZr, and NiZr 2). Metallography, x-ray diffraction (XRD), and thermal analysis were used for characterization of the alloys. The three phase equilibrium solidus temperature for the two alloys was found to be 1220 °C, which indicated the existence of a ternary eutectic reaction.


Gupta K.P.,Indian Institute of Metals
Journal of Phase Equilibria and Diffusion | Year: 2010

The Cobalt-Nickel-Yttrium (Co-Ni-Y) system was investigated and two isothermal sections were established. The Co-Ni system is a simple isomorphous system with solidus and liquidus lines very close to each other. The solid solution, face centered cubic (fcc) c phase, extends from fcc εCo to Ni. At the Co-end, at temperatures <422°C, the fcc αCo transforms to close packed hexagonal (cph)ε phase which is the terminal solid solution of cph εCo phase. The three binaries of the Co-Ni-Y system have 20 intermediate phases. A metastable phase was reported in the Co-Y system. Only one ternary intermediate phase has been reported to form in the Co-Ni-Y system. The Co-Ni-Y system was established by using 126 alloys with Y content up to 66.6 at.% Y. The Co-Ni-Y couple was analyzed by EPMA across the Co/Y, Ni/Y boundaries and the Co-Ni-Y region formed between the Co/Y and Ni/Y region.


Gupta K.P.,Indian Institute of Metals
Journal of Phase Equilibria and Diffusion | Year: 2010

The Cr-Ni-Re (Chromium-Nickel-Rhenium) ternary system was studied by using diffusion couple techniques and arc melted solid alloys. Electrolytic Cr and Ni and vacuum melted Re were used in this study of Cr-Ni-Re ternary system. Diffusion couples were prepared using Cr-Ni alloys/Ni-Re alloys, and sandwiched couples Cr/Ni/Re were prepared using a 50 μm thick Ni layer. The diffusion couples were prepared by vacuum welding for 20 min at 1175°C under a pressure of 34 MPa. The sandwiched couples were diffusion annealed at 1152°C for 4 to 64 h. The alloy diffusion couples were diffusion annealed at 1152°C for 50 and 100 h. Analysis of the diffusion zones of the diffusion couple was done by scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). The phase equilibria of the Cr-Ni-Re established by shows a simple isothermal section with only two three-phase equilibrium triangles and shows the r phase in equilibrium with the terminal solid solutions α, γ, and ε.


Gupta K.P.,Indian Institute of Metals
Journal of Phase Equilibria and Diffusion | Year: 2010

The cobalt-niobium-silicon (Co-Nb-Si) system at the temperature range of 800-1300 °C has been investigated. The Co-Nb system shows the presence of three intermediate phases, Co 3Nb (λ 3), Co 2Nb, and Co 6Nb 7 (μ), of which the Co 6Nb 7 and Co 2Nb phases melt congruently at 1402 and 1480 °C, respectively. The Co-Si system has five intermediate phases, Co 3Si (φ), αCo 2Si (ρ 1), βCo 2Si (ρ 2), CoSi (ζ), and CoSi 2 (π) of which the βCo 2Si, CoSi, and CoSi 2 phases melt congruently at 1334, 1460, and 1326 °C, respectively. The Co 2Nb 3Si phase with lattice parameter a = 1.196 nm was identified as the Mn 3Ni 2Si type phase with a superstructure of NiTi 2 phase.


Gupta K.P.,Indian Institute of Metals
Journal of Phase Equilibria and Diffusion | Year: 2010

The cobalt-chromium-silicon (Co-Cr-Si) system has been investigated. The Cr-Si system has four intermediate phases, which includes Cr 3Si (β), (γ), Cr 5Si 3, CrSi (ζ), and CrSi 2 (δ), of which the β and βCr 5Si 3 (λ 1), and δ phases melt congruently at 1770, 1680, and 1490 °C, respectively. Two binary Co-Si alloys with 20 at.% Si and 80 at.% Si were arc melted under argon using electrolytic 99.9 mass% purity Cr, and 99.99 mass% purity Co, and 99.99 mass% purity Si. Alloys were annealed in evacuated and sealed quartz capsules for 100 h at 1150 °C. The three isothermal sections of the Co-Cr-Si system between 800 and 1150 °C show continuous solid solution region ζ between the CoSi and CrSi phases. The existence of the pseudobinary divide the Co-Cr-Si system into two parts, one with Si content <50 at.% and the other with Si content >50 at.%.


Gupta K.P.,Indian Institute of Metals
Journal of Phase Equilibria and Diffusion | Year: 2010

The (nickel-rhenium-vanadium (Ni-Re-V) system was investigated to demonstrate the presence of a single isothermal section some and other aspects. The Ni-Re system was a simple peritectic system where the peritectic reaction L + ε ↔ γ occurred at 1620 °C and where ε and γ were the terminal solid solutions (Re) and (Ni). The Re-V system had two intermediate phases, such as σ and δ where the σ phase formed a pertiectic reaction L + ε ↔ σ at 2460 °C. The δ phase formed through a peritectoid reaction σ + α ↔ δ at 2280 °C. Investigations also revealed that the binary systems Ni-Re, Ni-V, and Re-V systems had seven intermediate phases, while the Ni-Re-V ternary system had one intermediate phase σ'.


Gupta K.P.,Indian Institute of Metals
Journal of Phase Equilibria and Diffusion | Year: 2010

The cobalt-tin-zirconium (Co-Sn-Zr) system was investigated to demonstrate the presence of a single isothermal section at considerably low temperature. The presence of another phase CoZr 3 (v) was reported, but required more investigation and confirmation. It was observed that all other phases were stoichiometric compounds except the Co 2Zr phase. The Co 2Zr, CoZr, and CoZr 2 phase were found to melt congruently at approximately 1620, 1420, and 1125 °C. The probable existence of another phase Sn 4Zr 5 (T) had also been suggested in the SnZr system. Detailed investigations revealed that 11 intermediate phases formed in the three binary systems, such as Co-Sn, Co-Zr, and Sn-Zr. The Co-Sn-Zr system was also investigated using 125 alloys arc melted under purified argon atmosphere.


Gupta K.P.,Indian Institute of Metals
Journal of Phase Equilibria and Diffusion | Year: 2010

The chromium-nickel-hafnium (Cr-Ni-Hf) system was investigated at the Ni-corner for the development of high temperature resistant brazing alloys. Investigations revealed that the Cr-Hf system had only one intermediate phase Cr 2Hf that existed in two polymorphic forms in high temperature Cr 2Hf (Y) phase and a low temperature Cr 2Hf (Y 1) phase. The Y phase melted congruently at 1825 °C and the polymorphic transformation temperature for the Cr 2Hf phase was 1335 °C. The Cr-Hf-Ni system was also reinvestigated at the Ni-Corner of the Cr-Hf-Ni system with the preparation of twenty two alloys using 99.98 mass% Cr, 99.9 mass% Hf, and 99.95 mass% Ni. The alloys were arc melted under argon atmosphere and were used in the as cast condition and in the 1227 °C annealed state to establish a partial isothermal section at 1227 °C and an isopleth at constant 5 at.% Cr content.

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