Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Engineering, Manufacturing
K. Lamb, K. Koube, J. Kacher, T. Sloop, N. Thadhani, S. S. Babu
Summary: This research investigates the effect of microstructure anisotropy in 316L stainless steel fabricated by laser powder bed fusion on its spall failure and properties. It is found that spall failure tends to initiate at melt pool boundaries and is heavily influenced by the orientation of the impact direction relative to the build direction. The spall behavior is more complex in samples impacted perpendicular to the build direction due to the orientation of microstructural features.
ADDITIVE MANUFACTURING
(2023)
Article
Metallurgy & Metallurgical Engineering
Xin-li Song, Chang-hu Huang, Juan Jia, Jing Liu
Summary: The effect of strain rate on the fracture behavior of Cr18Ni11Ti stainless steel at high temperatures was investigated. It was found that decreasing the strain rate led to a decrease in the yield strength, ultimate tensile strength, and reduction in area of the steel. At high strain rates, obvious necking and ductile fracture occurred, while at lower strain rates, intergranular brittle fracture appeared. This brittle fracture may be related to the segregation at grain boundaries and dislocation motion creep.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
H. Jin, B. Sanborn, W-Y Lu, B. Song
Summary: Mechanical characterization of a 304L-VAR stainless steel was conducted under low, intermediate, and high strain rates using different apparatuses. Tensile stress-strain curves showed linear elasticity, work hardening, necking, and fracture at each strain rate level. Flow stress and true failure strain both increased with increasing strain rate.
MECHANICS OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Jingsheng Xu, ManFu Wang
Summary: The effect of tensile pre-strain on the microstructure and mechanical properties of austenitic 301 stainless steel was investigated. It was found that tensile pre-strain is an effective method to improve the strength and microhardness of the steel, but it decreases the toughness and plasticity.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Engineering, Manufacturing
Miroslav Smid, Daniel Koutny, Katerina Neumannova, Zdenek Chlup, Lubos Nahlik, Michal Jambor
Summary: The hierarchical microstructure produced by L-PBF plays a key role in the superior mechanical properties, particularly the fine cell microstructure with heterogeneous distribution of dislocation density and alloying elements. While previous studies focused on the effect of this structure on monotonic loading, this study provides insight into the cyclic behavior of L-PBF processed metastable austenitic stainless steel 304L and its relation to microstructure evolution and strain-induced martensitic transformation.
ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Qingxuan Ran, Xiaoru Yang, Yage Meng, Xiaojun Jiang, Rihong Han, Shaoqing Wang, Yinan Jiao, Yabin Cao, Zhihao Feng
Summary: This study investigated the mechanical properties and microstructure evolution of an economical 19Cr-type TRIP-aided duplex stainless steel under varied uniaxial tensile strain rates at room temperature. The results showed that mechanical properties are sensitive to strain rates, with increasing rates leading to decreased ultimate tensile strength and elongation, hindering its application at high deformation rate conditions at room temperature.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Mechanics
Matti Lindroos, Matti Isakov, Anssi Laukkanen
Summary: The study presents a crystal plasticity model to analyze the microscale deformation of 301LN stainless steel, considering phase transformation and dislocation slip mechanisms. The model reveals the material's strain hardening and phase transformation characteristics under different strain rates and temperatures, showing good agreement with experimental findings.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
L. Claeys, I De Graeve, T. Depover, K. Verbeken
Summary: In-situ tensile testing of electrochemically hydrogen charged 304L stainless steel at different crosshead displacement rates results in different elongation at fracture compared to air, with increased ductility at higher engineering strain rates. The enhanced martensitic transformations with hydrogen provide opportunities for creating hydrogen resistant materials. Tensile pre-straining increases HE susceptibility due to stress concentrations and alpha'-martensite.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
Gustavo Henrique Pelissari, Diogo Pedrino Braga, Pedro Henrique Fernandes Oliveira, Danielle Cristina Camilo Magalhaes, Maurizio Ferrante, Carlos Alberto Della Rovere, Andrea Madeira Kliauga, Levi de Oliveira Bueno, Vitor Luiz Sordi
Summary: AISI 200LN is a low nickel austenitic stainless steel with excellent mechanical properties at room and cryogenic temperatures, and this study aims to assess its mechanical response under hot tensile and creep tests. By conducting tests and analyzing correlations among various factors, the study provides insights into the creep behavior of AISI 201LN alloy, compared to traditional stainless steels in the 300 series.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Engineering, Industrial
Qunjie Lu, Jinyang Zheng, Gai Huang, Keming Li, Huiming Ding, Zhenyu Wang, Shaoan Cheng
Summary: The study investigated the cryogenic properties of warm-formed 530408 metastable austenitic stainless steel, showing a decrease in SIM content and dislocation density, as well as an improvement in cryogenic ductility and impact toughness. Despite a decrease in strength, warm-forming can significantly enhance the combined mechanical properties at cryogenic temperatures compared to cold-forming.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Kaushal Kishore, A. K. Chandan, B. K. Sahoo, L. K. Meena
Summary: The study explores how different strain-rates and pre-strain can affect the electrochemical corrosion behavior of 304L stainless steel. It is found that higher strain-rates may improve corrosion resistance, with the microstructure and substructure evolution depending heavily on the strain-rate. The corrosion behavior is shown to be more strongly influenced by strain-rate compared to strain, with a complex interplay between various factors in the microstructure.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Tianyu Zhang, Lingyu Wang, Yu Wang, Jun Hu, Hongshuang Di, Wei Xu
Summary: Ausforming is a promising treatment process to address the strength-ductility trade-off in carbide-free bainitic steel. The effects of ausforming strain on bainitic transformation kinetics, morphology, and retained austenite (RA) features were systematically investigated. High-temperature ausforming at different strains led to the flattening of prior austenite grains and an increase in RA content. The presence of microband structures was found to reduce the transformed volume fraction and maximum transformation rate. However, small deformations promoted the initial transformation rate, while larger deformations inhibited bainite transformation kinetics due to the mechanical stability of deformed austenite. Ausforming improved the strength and ductility of the steel by promoting the formation of blocky RA, which enhanced ductility and work hardening capacity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Yunbo Lei, Jiuling Xu, Zhenbo Wang
Summary: A gradient nanostructured (GNS) surface layer with a controllable martensite fraction has been successfully synthesized on 316L austenitic stainless steel by controlling the temperature. Fatigue experiments showed significantly enhanced fatigue properties of GNS samples at high strain amplitudes, especially in the presence of a dual-phase surface layer. The GNS surface layer enhances strength-ductility synergy and suppresses surface fatigue defects during fatigue, while the dual-phase structure promotes martensite and stacking faults, further enhancing fatigue properties at high strain amplitudes.
Article
Engineering, Mechanical
Manish Kumar Gupta, N. K. Singh, N. K. Gupta
Summary: This study aims to investigate the deformation behavior and notch sensitivity of a super duplex stainless steel, SDSS 2507, under different strain rates and temperatures. The experiments reveal that temperature and strain rate have an influence on the steel, and dynamic strain ageing is observed during thermal effects. Heat treatment enhances the tensile strength of the steel, but at 700 degrees C, its strength decreases and it exhibits brittle behavior.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
