Search Results - "Nack, J"

Brittle intermetallic compound makes ultrastrong low-density steel with large ductility by Kim, Sang-Heon, Kim, Hansoo, Kim, Nack J.

“…Alloying steel with aluminium improves the material’s strength-to-weight ratio, but the resulting formation of brittle intermetallic compounds within the steel…”
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Fe-Al-Mn-C lightweight structural alloys: a review on the microstructures and mechanical properties by Kim, Hansoo, Suh, Dong-Woo, Kim, Nack J

“…Adding a large amount of light elements such as aluminum to steels is not a new concept recalling that several Fe-Al-Mn-C alloys were patented in 1950s for…”
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Effects of Mn and Al contents on cryogenic-temperature tensile and Charpy impact properties in four austenitic high-Mn steels by Sohn, Seok Su, Hong, Seokmin, Lee, Junghoon, Suh, Byeong-Chan, Kim, Sung-Kyu, Lee, Byeong-Joo, Kim, Nack J., Lee, Sunghak

“…Effects of Mn (19 and 22wt.%) and Al (0 and 2wt.%) contents on tensile and Charpy impact properties in four austenitic high-Mn steels were investigated at room…”
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Improvement of strength – ductility balance of B2-strengthened lightweight steel by Hwang, J.H., Trang, T.T.T., Lee, O., Park, Gyeongbae, Zargaran, A., Kim, Nack J.

“…The microstructure evolution and tensile properties of a newly designed Fe-21Mn-10Al-1C-5Ni (wt.%) lightweight steel subjected to two annealing conditions…”
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Novel ultra-high-strength (ferrite+austenite) duplex lightweight steels achieved by fine dislocation substructures (Taylor lattices), grain refinement, and partial recrystallization by Sohn, Seok Su, Song, Hyejin, Suh, Byeong-Chan, Kwak, Jai-Hyun, Lee, Byeong-Joo, Kim, Nack J., Lee, Sunghak

“…Weight reduction from down-gauged high-strength steels has been an important issue in automotive industries to improve fuel efficiency. In addition to…”
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Effects of Al addition on tensile properties of partially recrystallized austenitic TRIP/TWIP steels by Jo, Min Chul, Jo, Min Cheol, Zargaran, Alireza, Sohn, Seok Su, Kim, Nack J., Lee, Sunghak

“…Austenitic high-Mn steels are regarded as a promising candidate for high-strength cold-rolled steels because their combination of strength and ductility…”
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Novel ferrite–austenite duplex lightweight steel with 77% ductility by transformation induced plasticity and twinning induced plasticity mechanisms by Sohn, Seok Su, Choi, Kayoung, Kwak, Jai-Hyun, Kim, Nack J., Lee, Sunghak

“…The need for lightweight materials has been an important issue in automotive industries to reduce greenhouse gas emission and to improve fuel efficiency. In…”
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Novel ultra-high-strength Cu-containing medium-Mn duplex lightweight steels by Song, Hyejin, Yoo, Jisung, Kim, Sang-Heon, Sohn, Seok Su, Koo, Minseo, Kim, Nack J., Lee, Sunghak

“…High strength and ductility and vehicle's weight reduction are key issues for improving fuel efficiency in automotive industries. In addition, structural…”
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Interpretation of cryogenic-temperature Charpy impact toughness by microstructural evolution of dynamically compressed specimens in austenitic 0.4C–(22–26)Mn steels by Kim, Hyunmin, Ha, Yumi, Kwon, Ki Hyuk, Kang, Minju, Kim, Nack J., Lee, Sunghak

“…In this study, the Charpy impact toughness of three austenitic high-Mn steels was evaluated at room and cryogenic temperatures, and interpreted by deformation…”
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Transformation behavior and microstructural characteristics of acicular ferrite in linepipe steels by Kim, Young Min, Lee, Hakcheol, Kim, Nack J.

“…Transformation behavior and morphological characteristics of acicular ferrite in linepipe steels were investigated through the use of a dilatometer and EBSD…”
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Quasi-static and dynamic deformation mechanisms interpreted by microstructural evolution in TWinning Induced Plasticity (TWIP) steel by Park, Jaeyeong, Kang, Minju, Sohn, Seok Su, Kim, Sang-Heon, Kim, Hyoung Seop, Kim, Nack J., Lee, Sunghak

“…As automotive steels require high impact resistance for absorbing impact energy upon vehicle body collision, detailed investigation of dynamic deformation…”
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Effect of Sn addition on the microstructure and deformation behavior of Mg-3Al alloy by Suh, Byeong-Chan, Kim, Jae H., Bae, Jun Ho, Hwang, Ji Hyun, Shim, Myeong-Shik, Kim, Nack J.

“…Mg alloys generally suffer from their poor formability at low temperatures due to their strong basal texture and a lack of adequate deformation systems. In the…”
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Twinning-mediated formability in Mg alloys by Suh, Byeong-Chan, Kim, Jae H., Hwang, Ji Hyun, Shim, Myeong-Shik, Kim, Nack J.

“…Mg alloys are promising candidates for automotive applications due to their low density and high specific strength. However, their widespread applications have…”
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Effects of Al addition on deformation and fracture mechanisms in two high manganese TWIP steels by Chin, Kwang-Geun, Kang, Chung-Yun, Shin, Sang Yong, Hong, Seokmin, Lee, Sunghak, Kim, Hyoung Seop, Kim, Kyung-hun, Kim, Nack J.

“…▶ Two TWIP steels or specimens after the tensile or cup forming test consisted of austenite. ▶ The delayed fracture in the 22Mn steel was because a small…”
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Simple method for tailoring the optimum microstructures of high-strength low-alloyed steels by the use of constitutive equation by Kim, Young Min, Kim, Sung Kyu, Kim, Nack J.

“…A simple approach for tailoring the microstructure to meet the property requirements of low carbon steels is studied with the material constants of the Swift…”
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Effects of solute segregation on tensile properties and serration behavior in ultra-high-strength high-Mn TRIP steels by Jo, Min Chul, Choi, Jin Hyeok, Lee, Hyungsoo, Zargaran, A., Ryu, Joo Hyun, Sohn, Seok Su, Kim, Nack J., Lee, Sunghak

“…Austenitic high-Mn TWinning- and Transformation-Induced Plasticity (TWIP and TRIP) steels are strong candidates for GPa-grade cold-rolled steel sheets. The…”
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Microstructural evolution and deformation behavior of twinning-induced plasticity (TWIP) steel during wire drawing by Hwang, Joong-Ki, Yi, Il-Cheol, Son, Il-Heon, Yoo, Jang-Yong, Kim, Byoungkoo, Zargaran, A., Kim, Nack J.

“…The effect of wire drawing on the microstructural evolution and deformation behavior of Fe–Mn–Al–C twinning-induced plasticity (TWIP) steel has been…”
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Effect of secondary phase particles on the tensile behavior of Mg-Zn-Ca alloy by Baek, Seung Mi, Park, Hyung Keun, Yoon, Jae Ik, Jung, Jaimyun, Moon, Ji Hyun, Lee, Seok Gyu, Kim, Jae H., Kim, Taek Soo, Lee, Sunghak, Kim, Nack J., Kim, Hyoung Seop

“…In the present study, the effect of secondary phase particles and deformation localization on tensile behaviors of Mg-Zn-Ca alloy were investigated using…”
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Microstructure and tensile properties of high-strength high-ductility Ti-based amorphous matrix composites containing ductile dendrites by Oh, Yoon S., Kim, Choongnyun Paul, Lee, Sunghak, Kim, Nack J.

“…In the present study, two Ti-based amorphous matrix composites containing ductile dendrites dispersed in an amorphous matrix were fabricated by a vacuum arc…”
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Interpretation of quasi-static and dynamic tensile behavior by digital image correlation technique in TWinning Induced Plasticity (TWIP) and low-carbon steel sheets by Kang, Minju, Park, Jaeyeong, Sohn, Seok Su, Kim, Hyoung Seop, Kim, Nack J., Lee, Sunghak

“…In this study, dynamic tensile tests were conducted on TWinning Induced Plasticity (TWIP) and low-carbon (LC) steel sheets at a strain rate of 1500–2000/s by…”
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