Article
Nanoscience & Nanotechnology
Yuxiang Liu, Mingxiang Liu, Jianlei Zhang, Wei He, Zhiping Luo, Changjiang Song, Qijie Zhai
Summary: In this study, it was found that the addition of chromium had significant effects on the microstructure and mechanical properties of Fe-28Mn-9Al-1.2C alloy, with different chromium addition levels showing nonlinear impacts on yield strength and total elongation of the strips. Annealing treatment improved the yield strength of all strips, and the formation of Cr23C6 carbides at austenite grain boundaries could lower the ductility of the strips containing 9% chromium.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Ziyuan Gao, Qingfeng Kang, Xueliang An, Hui Wang, Cunyu Wang, Wenquan Cao
Summary: The microstructure evolution and mechanical properties of a Fe-Mn-Al-C austenitic low-density steel were studied at different hot-rolling reductions. It was found that increasing the hot-rolling reduction resulted in a uniform grain refinement and an increase in dislocation density. This led to enhancements in yield strength and ultimate tensile strength, while only causing a slight decrease in ductility and toughness. The research suggests that increasing the hot-rolling reduction is an effective approach to enhance the overall mechanical properties of the low-density steel with a fully austenitic microstructure.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Liudmila V. Radionova, Danil V. Perevozchikov, Aleksandr N. Makoveckii, Victor N. Eremin, Alexander M. Akhmedyanov, Sergey V. Rushchits
Summary: The kinetics of austenite grain growth during thermomechanical treatment of AISI 321 steel with a relatively high content of carbon and titanium were studied. The presence of titanium carbides and carbonitrides was found to suppress grain growth. An analysis was made using the developed grain growth model to explain the formation of large grains in the shell during production.
Article
Materials Science, Multidisciplinary
Shubo Gao, Ruiliang Liu, Rui Huang, Xu Song, Matteo Seita
Summary: Combining directed energy deposition and single point incremental forming processes can produce stainless steel 316L samples with a high density of twin boundaries post-recrystallization, enhancing the alloy's properties. The study explores the influence of various SPIF parameters on recrystallization and demonstrates the production of gradient and sandwich microstructures for improved performance.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Zhiqi Xie, Weijun Hui, Saiyihan Bai, Yongjian Zhang, Xiaoli Zhao, Binyang Li
Summary: This study investigated the effect of annealing temperature on the microstructure and mechanical properties of Fe-25Mn-10Al-1.1C-(0,0.48)V austenitic low-density steels. The results showed that annealing temperature had a significant influence on the microstructures of the steels. The addition of V promoted the precipitation reaction and increased the ferrite content. VC inhibited the formation of x-carbide and delayed the recrystallization, leading to ultra-high yield strength of the V-added steel when annealed at 900℃. This study provides a promising strategy to enhance the yield strength of austenitic low-density steel by tailoring annealing temperature and adding V.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Igor Yu. Litovchenko, Sergey A. Akkuzin, Nadezhda A. Polekhina, Kseniya V. Almaeva, Evgeny N. Moskvichev, Alexander N. Tyumentsev
Summary: New thermomechanical treatments combining plastic deformation with cooling in liquid nitrogen followed by warm deformation and annealing are applied to form fine-grained structure in metastable austenitic steel. The structural-phase transformations during these treatments are studied by various analytical techniques. The treatments lead to an increase in yield strength and modification of microstructure and phase composition, improving the mechanical properties of the steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Marcos Natan da Silva Lima, Rodrigo de Carvalho Paes Loureiro, Miloslav Beres, Mohammad Masoumi, Jessica Calvo Munoz, Samuel Filgueiras Rodrigues, Hamilton Ferreira Gomes de Abreu, Jose Maria Cabrera Marrero
Summary: The correlation between microstructure, crystallographic orientation, and grain boundaries characteristics of an austenitic high manganese steel was systematically investigated. It was found that the fraction of low-energy 13 twin boundaries significantly increased in the 70% deformed sample, coupled with the formation of {011} austenitic structure and twinning-induced plasticity. The observed ductile-brittle fracture mode in the 70% cold-rolled sample can be attributed to the high fraction of low-energy 13 twin boundaries.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Igor Litovchenko, Sergey Akkuzin, Nadezhda Polekhina, Kseniya Almaeva, Valeria Linnik, Anna Kim, Evgeny Moskvichev, Vyacheslav Chernov
Summary: This study investigates the microstructure of a new low-activation chromium-manganese austenitic steel using X-ray diffraction, scanning and transmission electron microscopy. The structure, dislocation character, and particle composition of the steel are analyzed. The study also describes the processes that occur in the steel during cold-rolling deformation. The results show that the mechanical properties of the high-manganese steel are comparable to or better than those of well-known analogs, and the steel exhibits better plastic properties due to the twinning-induced plasticity effect. The low-activation chromium-manganese austenitic steels with increased austenite stability are considered promising structural materials for nuclear power engineering.
Article
Engineering, Chemical
P. S. Ninawe, S. Ganesh, P. Sai Karthik, S. B. Chandrasekhar, R. Vijay
Summary: Austenitic oxide dispersion strengthened (AODS) steel was fabricated using two-stage ball milling and consolidation through spark plasma sintering (SPS). The effect of SPS temperature on density, microstructure, and mechanical properties of the consolidated samples was investigated, demonstrating the best combination of strength and elongation achieved on AODS alloys processed using MA and SPS.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Diana Farkas
Summary: Molecular Dynamics simulations were used to study the diffusion process along a grain boundary in a model austenitic stainless steel. The results showed that Cr diffuses about 25 percent faster than Fe or Ni, and the diffusion kinetics varied widely among different general high angle boundaries. Faster diffusion kinetics were associated with higher energy grain boundaries and narrower boundaries with more extra volume and less centrosymmetric structure.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Milos Mician, Martin Fratrik, Jaromir Moravec, Martin Svec
Summary: Fine-grained high-strength low-alloyed (HSLA) steels have advantageous mechanical properties, but changes in grain size during welding can affect material properties. This study experimentally determines the growth kinetics of austenitic grain in fine-grained HSLA steel S960MC, providing insights for predicting austenitic grain size in the heat-affected zone.
Article
Materials Science, Multidisciplinary
Mochammad Syaiful Anwar, Robert R. Widjaya, Leonardo Bayu Adi Prasetya, Abdul Aziz Arfi, Efendi Mabruri, Eddy S. Siradj
Summary: The effect of grain size on the mechanical properties and creep rupture of 253 microalloyed austenitic stainless steel was studied. The results showed that there was a correlation between grain size, mechanical properties, and creep rupture time. A finer grain size exhibited better mechanical properties and a shorter creep rupture time, while a coarser grain size resulted in lower mechanical properties and a longer creep rupture time. An initial grain size of 40.35 μm was found to be the optimal grain size for achieving a high creep rupture time.
Article
Materials Science, Multidisciplinary
Mohammad Ali Mostafaei, Mohsen Kazeminezhad
Summary: Different heating rates were used during ultra-rapid annealing of severely deformed low carbon steel, resulting in improved hardness, strength, and ductility. The formation of a bimodal grain size (BGS) microstructure at a heating rate of 600 degrees C/s and a temperature of 730 degrees C led to the best performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Igor Litovchenko, Sergey Akkuzin, Nadezhda Polekhina, Kseniya Almaeva, Evgeny Moskvichev
Summary: The effect of high-temperature thermomechanical treatment on the AISI 321 type metastable austenitic steel was investigated. The treatment resulted in grain refinement, increase in strength properties, and changes in grain boundaries. The mechanisms of plastic deformation and strengthening were discussed.
Article
Chemistry, Physical
Pavel Dolzhenko, Marina Tikhonova, Rustam Kaibyshev, Andrey Belyakov
Summary: The features of discontinuous dynamic recrystallization in a highly-alloyed austenitic stainless steel were studied, showing power law relationships between DRX grain size and dislocation density with temperature-compensated strain rate or peak flow stress. The obtained dependencies suggest a unique power law function between the dislocation density and the DRX grain size.
Article
Materials Science, Multidisciplinary
M. F. Buchely, D. M. Field, D. C. Van Aken
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
YubRaj Paudel, Joseph Indeck, Kavan Hazeli, Matthew W. Priddy, Kaan Inal, Hongjoo Rhee, Christopher D. Barrett, Wilburn R. Whittington, Krista R. Limmer, Haitham El Kadiri
Article
Materials Science, Multidisciplinary
D. M. Field, J. S. Montgomery, K. R. Limmer, K. Cho
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Michael Piston, Laura Bartlett, Krista R. Limmer, Daniel M. Field
Article
Chemistry, Physical
Jingjing Qing, Simon Lekakh, Mingzhi Xu, Daniel Field
Summary: The study investigated the complex nature of nodular graphite nuclei in spheroidal graphite iron with small graphite nodules, revealing the nucleation sites, chemistry, and crystallographic orientations inside the graphite nodules. The research also discovered the presence of oxide, sulfide, and nitride compounds within the graphite nodules, providing insights into the formation and behavior of complex nodular graphite nuclei.
Article
Materials Science, Multidisciplinary
Daniel M. Field, Stephen R. Cluff, Krista R. Limmer, Jonathan S. Montgomery, Daniel J. Magagnosc, Kyu C. Cho
Summary: The research found that the normalizing temperature of wrought steel has little effect on strength and ductility, but higher normalizing temperatures can lead to an increase in grain size and a slight decrease in toughness. Lower austenitizing temperatures may result in incomplete austenitic structure formation before quenching, affecting impact behavior. The best properties were obtained after austenitizing at 915 degrees C followed by water quenching.
Article
Chemistry, Physical
Daniel M. Field, Krista R. Limmer, Billy C. Hornbuckle, Dean T. Pierce, Ken E. Moore, Katherine M. Sebeck
Summary: Alloy partitioning during heat treatment in a lightweight precipitation hardened steel was investigated using transmission electron microscopy and atom probe tomography. The mechanical properties are discussed as a function of the effect of solution treatment temperature and aging time, giving rise to variations in chemical modulation.
Article
Nanoscience & Nanotechnology
M. F. Buchely, S. Chakraborty, V. Athavale, L. Bartlett, R. O'Malley, D. Field, K. Limmer, K. Sebeck
Summary: This paper presents a study on the thermo-mechanical behavior of an ultra-high strength CrNiMoV steel at high temperatures and medium strain rates through hot tensile tests. The results show that the flow stress decreases with increasing temperature and increases with increasing strain rate. The inclusion and porosity levels affect the elongation and ultimate tensile strength of the steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
D. M. Field, D. J. Magagnosc, B. C. Hornbuckle, J. T. Lloyd, K. R. Limmer
Summary: Neutron diffraction was used to study the deformation response of a medium-Mn steel at different temperatures. The results showed that the steel exhibited different deformation behaviors, including phase transformation, twinning, and mixed-mode deformation, depending on the temperature. These deformation responses were explained by the temperature-dependent stacking fault energy curve, as well as the chemical and microstructural inhomogeneity of the alloy.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Engineering, Manufacturing
Heather A. Murdoch, Daniel M. Field, Benjamin A. Szajewski, Levi D. Mcclenny, Andrew Garza, Berend C. Rinderspacher, Mulugeta A. Haile, Krista R. Limmer
Summary: A simple Gaussian process regressor model was used to predict the hardness and toughness response of tempered martensitic steels, showing increased accuracy compared to linear regression. The analysis revealed that tempering temperature and carbon content were the most important input features affecting the model's performance. The SHAP analysis demonstrated the complex relationships between alloy composition and mechanical properties captured by machine learning approaches.
INTEGRATING MATERIALS AND MANUFACTURING INNOVATION
(2023)
