Article
Nanoscience & Nanotechnology
Lei Tang, Fuqing Jiang, Huibin Liu, Saurabh Kabra, Biao Cai
Summary: High manganese steels, with low production cost and potential for excellent strength-ductility combinations, are being recognized as promising structural materials for cryogenic applications. The addition of 1 wt% Cu to the steel effectively improves yield strength (YS) and elongation, and increases stacking fault energy (SFE), delaying the formation of martensite. At lower deformation temperatures, tensile strength increases linearly, while stacking faults and dislocations are promoted, and SFE decreases linearly. Contributions to YS and flow stress from lattice friction, grain boundary, dislocation, deformation twins, and phase transformation were determined.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Sebastian Wesselmecking, Marco Haupt, Yan Ma, Wenwen Song, Gerhard Hirt, Wolfgang Bleck
Summary: A novel thermomechanical treatment combining dislocation slip, twinning-induced plasticity, and transformation-induced plasticity was developed to manufacture high manganese steel with outstanding mechanical performance. The warm rolling and recovery annealing process resulted in ultra-high tensile strength and sufficient ductility in the steel. This combination of properties makes the steel suitable for lightweight construction in automotive or aerospace industry.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Renlong Xiong, Yi Liu, Haitao Si, Huabei Peng, Shanling Wang, Binhan Sun, Hanxin Chen, Hyoung Seop Kim, Yuhua Wen
Summary: The addition of Si element in Fe-17Mn-1.1C-xSi steels can increase the yield strength without sacrificing ductility. The increase in Si content reduces the critical strain for the onset of mechanical twinning, resulting in an increase in twin volume fraction.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Hyo Ju Bae, Kwang Kyu Ko, Muhammad Ishtiaq, Jung Gi Kim, Hyokyung Sung, Jae Bok Seol
Summary: Assessing the stacking fault forming probability (P-sf) and stacking fault energy (SFE) in medium- or high-Mn base structural materials can anticipate and elucidate the microstructural evolution before and after deformation. The influence of carbon-doping contents on the structural properties of Fe-17Mn-xC steels and the relationship with SFE were investigated using atom probe tomography and transmission electron microscopy. The results showed that high carbon doping increased SFE and had an inverse relationship with the width of localized stacking faults.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Zongrui Pei, Shiteng Zhao, Martin Detrois, Paul D. Jablonski, Jeffrey A. Hawk, David E. Alman, Mark Asta, Andrew M. Minor, Michael C. Gao
Summary: Metallic alloys have been widely used in human civilization due to their balanced strength and ductility. This study proposes a possible mechanism based on the parameter kappa, which enhances the work-hardening ability of high-entropy alloys. The results offer a physical picture of the strengthening effects and can be used as a practical design principle for enhancing the strength-ductility synergy in metallic materials.
NATURE COMMUNICATIONS
(2023)
Review
Engineering, Civil
M. B. Jablonska
Summary: This study discusses the temperature change of TWIP steels during deformation, as a result of the conversion of plastic deformation work into heat. The methods of measuring or modeling these temperature changes are presented. The study highlights that TWIP steels generate higher heat during plastic deformation compared to conventional steels, due to their higher yield stresses and limit strains. This heat has a significant impact on the microstructure and properties of the deformed material. It can lead to changes in deformation mechanisms and affect workability and energy consumption.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Zhichao Liu, Zhihua Nie, Xianjin Ning, Xiuchen Zhao, Xiaodong Yu, Fuchi Wang, Chengwen Tan
Summary: This study investigates the mechanical response and microstructural evolution of Ni-27 W alloys, finding that they exhibit a high strain hardening capacity mainly due to the dominance of planar slip mechanism in plastic deformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Da Ren, Chenchong Wang, Xiaolu Wei, Qingquan Lai, Wei Xu
Summary: A deep learning framework is developed to predict the tensile properties of dual-phase steels, which handles a multimodal database including composition and multi-source microstructure images. The model shows excellent generality and coupling analysis ability, and achieves accurate prediction in the large stress-strain range by integrating multi-source microstructure information.
Article
Nanoscience & Nanotechnology
Agnieszka Teresa Krawczynska, Michael Kerber, Przemyslaw Suchecki, Barbara Romelczyk-Baishya, Malgorzata Lewandowska, Daria Setman
Summary: The study investigates the impact of stacking fault energy on the microstructure evolution and mechanical properties of nanostructured metals under high pressure annealing. It demonstrates that pressure applied during annealing can lead to a more profound retardation of microstructure evolution in materials with low stacking fault energy. The study concludes that the twinning deformation mechanism generates a higher dislocation density and a lower grain size in the low stacking fault energy material.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
N. Hashimoto, E. Wada, H. Oka
Summary: By investigating the effect of stacking fault energy on microstructural evolution in reduced activation high entropy alloys, it was found that the stacking fault energy increased with increasing Ni and Mn concentration in FeCrNiMn alloys. FeCr 0.8 Ni 1.5 Mn 1.5 had the highest stacking fault energy, and the yield strength and elongation of deformed FeCrNiMn alloys also showed Ni and Mn concentration dependence. Electron irradiation at 400 degrees C formed black dots and self-interstitial atom faulted loops in all FeCrNiMn alloys, but no observable voids. Comparing the microstructural evolution, FeCr 0.8 Ni 1.3 Mn 1.3 and FeCr 0.8 Ni 1.5 Mn 1.5 alloys showed less faulted loop formation and growth. Therefore, FeCrNiMn-based high entropy alloys can be developed as high irradiation resistant materials by controlling stacking fault energy with optimized element concentration.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
T. Riaz, S. R. Das, P. Sahu
Summary: The deformation behavior of three high-Mn steels with varying Al contents was studied based on their respective stacking fault energies. It was found that the Al-free steel exhibited the highest strain hardening rate, which decreased with the addition of Al. Calculations based on critical shear stress provided a better explanation for the adaptation of plasticity mechanisms in these steels.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Jun Hu, Grant Thomas
Summary: The study focuses on investigating how temperature and strain rate affect the tensile properties of selected AHSSs and how these factors correspondingly shift their distributions in the banana chart. Explanations and discussions on the possible mechanisms behind these effects are also presented.
Article
Nanoscience & Nanotechnology
Qi Yang, Qidi Sun, Weitao Yang, Qingguo Hao, Xiaodong Wang, Bin Zhang
Summary: By investigating the two main deformation modes during low-cycle fatigue (LCF), the microstructural evolution, four-stage cyclic hardening behavior, and the reason for the superior LCF resistance of Fe-30.7Mn-4.3Si-1.8Al austenitic transformation-induced-plasticity (TRIP) steel were determined.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Dong Lang, Qiangguo Li, Xuefei Huang, Weigang Huang
Summary: This study investigated the effects of alloying elements on the stacking fault energy (SFE) and driving force of fcc to hcp transformation in high manganese steels. The results showed that Cr and Si influenced the SFE linearly with the content of C and Mn, leading to different behaviors in terms of strength and transformation properties of high manganese steels.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Chemistry, Physical
Jiajun Lu, Jinkai Wang, Kaiwei Wan, Ying Chen, Hao Wang, Xinghua Shi
Summary: In this study, a machine learning interatomic potential with a deep neural network method was developed for the TiAlNb ternary alloy based on a dataset built by first-principles calculations. The potential accurately predicted the macroscopic properties such as lattice constant and elastic constants, surface energies, vacancy formation energies, stacking fault energies, and the formation energy and stacking fault energy of α-TiAl doped with Nb. The potential was validated by experiments and found to be applicable under more practical conditions.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Ana Larissa Melo Feitosa, Julian Escobar, Giovani Goncalves Ribamar, Julian Arnaldo Avila, Angelo Fernando Padilha
Summary: The study found that increasing the aging temperature leads to an increase in the reverted austenite fraction in Fe-Ni alloys, but above 675 degrees Celsius, the reverted austenite phase becomes partially unstable and partly transforms into martensite after cooling. Additionally, the coalescence and dissolution of precipitates occur simultaneously, resulting in a decrease in hardness.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Engineering, Manufacturing
Tiago A. Rodrigues, J. D. Escobar, Jiajia Shen, Valdemar R. Duarte, G. G. Ribamar, Julian A. Avila, Emad Maawad, Norbert Schell, Telmo G. Santos, J. P. Oliveira
Summary: This study investigates the precipitation kinetics of secondary phases and the dissolution of delta-ferrite in 316 L stainless steel walls fabricated by WAAM through heat treatments and synchrotron X-ray diffraction measurements. The research found a direct relationship between the amount of delta-ferrite and hardness values in the fabricated parts.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Eduardo B. Fonseca, Julian D. Escobar, Andre H. G. Gabriel, Giovani G. Ribamar, Torben Boll, Eder S. N. Lopes
Summary: This study investigates the kinetics of retained austenite decomposition in laser powder bed fusion of tool steels using synchrotron X-ray diffraction. The results reveal different microstructural paths and transformation products at different temperatures.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
G. G. Ribamar, J. D. Escobar, A. Kwiatkowski da Silva, N. Schell, J. A. Avila, A. S. Nishikawa, J. P. Oliveira, H. Goldenstein
Summary: The addition of Si to steels delays cementite precipitation and promotes carbon partitioning from martensite to retained austenite, which improves ductility and toughness. The present study investigates the carbon partitioning and austenite decomposition in a modified Si hypereutectoid bearing steel during tempering. The results show that carbon partitioning occurs at temperatures below 300 degrees C without significant phase decomposition, and a transition temperature for austenite carbon enrichment and decomposition is observed at 350 degrees C.
Article
Materials Science, Multidisciplinary
F. F. Conde, G. G. Ribamar, J. D. Escobar, A. L. Jardini, M. F. Oliveira, J. P. Oliveira, J. A. Avila
Summary: Maraging steel is sensitive to the precipitation of intermetallics during aging heat treatments. This study used EBSD to analyze the microstructures of maraging steel and found that solubilization of the steel resulted in a more homogeneous microstructure with new grain boundaries. Tempering heat treatments relieved martensite strain and increased band contrast values. Aging had a minimal impact on the EBSD analysis results.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
G. G. Ribamar, G. Miyamoto, T. Furuhara, J. D. Escobar, J. A. Avila, E. Maawad, N. Schell, J. P. Oliveira, H. Goldenstein
Summary: The evolution of retained austenite in a high-carbon high-silicon bearing steel during fast tempering was explored using high energy X-ray diffraction. The study revealed that the stability of retained austenite and the degree of phase decomposition can be controlled by adjusting the tempering temperature. The research also found that stress relief can reduce the lattice anisotropy of retained austenite.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
