Effect of Cu and solid solution temperature on microstructure and mechanical properties of Fe- Mn-Al-C low-density steels

被引:20
作者
Xie, Zhiqi [1 ]
Hui, Weijun [1 ]
Zhang, Yongjian [1 ]
Zhao, Xiaoli [1 ]
机构
[1] Beijing Jiaotong Univ, Mat Sci & Engn Res Ctr, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China
来源
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2022年 / 18卷
关键词
Low-density steel; Cu; kappa-carbide; Microstructure; Mechanical property; STRAIN-HARDENING BEHAVIOR; X-RAY-DIFFRACTION; TENSILE DEFORMATION; HIGH-STRENGTH; INDUCED PLASTICITY; AUSTENITIC STEELS; PHASE; EVOLUTION; DUCTILITY; PRECIPITATION;
D O I
10.1016/j.jmrt.2022.03.077
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Relatively low yield strength (YS) level restricts austenitic low-density steels to some applications requiring small or no deformation than impact energy absorption. Therefore, to enhance the YS of this type of steel, this research investigates variations of microstructure and mechanical properties of two austenitic low-density steels (Fe-25Mn-10Al-1.1C-(0,0.25) Cu) with solid solution temperatures (TS, 850 ?-1050 ?). The results show that TS and Cu have significant impacts on the microstructure characteristics and mechanical properties of the two tested steels. At low (TS) of 850 ?, an increase of 170 MPa in YS compared with that of Cu-free steel was obtained in Cu-containing steel, which is mainly attributed to much finer grain size, more fine twins, and high dislocation density of the latter. An increase in T-S caused the kappa-carbides in the two steels to dissolve completely, but the austenite content in Cu-containing steel remained largely stable for the addition of Cu. As a result, the strength of the two tested steels decreased while the ductility increased, and both the strength and yield-to-tensile strength ratio of Cu-containing steel are remarkably higher than those of Cu-free steel. It is concluded that the Cu-containing steel exhibits a superior combination of YS and ductility together with a ~17% reduction in density compared to pure iron. This study provides a promising way to further enhance the YS of austenitic low-density steels through the addition of a small amount of Cu and tailoring T-TS. (C) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC
引用
收藏
页码:1307 / 1321
页数:15
相关论文
共 56 条
[41]   Effect of Austenite Stability on Microstructural Evolution and Tensile Properties in Intercritically Annealed Medium-Mn Lightweight Steels [J].
Song, Hyejin ;
Sohn, Seok Su ;
Kwak, Jai-Hyun ;
Lee, Byeong-Joo ;
Lee, Sunghak .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2016, 47A (06) :2674-2685
[42]   High-strength Fe-20Mn-Al-C-based Alloys with Low Density [J].
Sutou, Yuji ;
Kamiya, Naohide ;
Umino, Reiko ;
Ohnuma, Ikuo ;
Ishida, Kiyohito .
ISIJ INTERNATIONAL, 2010, 50 (06) :893-899
[43]   Comparison of the Dislocation Density in Martensitic Steels Evaluated by Some X-ray Diffraction Methods [J].
Takebayashi, Shigeto ;
Kunieda, Tomonori ;
Yoshinaga, Naoki ;
Ushioda, Kohsaku ;
Ogata, Shigenobu .
ISIJ INTERNATIONAL, 2010, 50 (06) :875-882
[44]   An investigation to the microstructural evolution of Fe-29Mn-5Al dual-phase twinning-induced plasticity steel through annealing [J].
Torabinejad, V. ;
Zarei-Hanzaki, A. ;
Moemeni, S. ;
Imandoust, A. .
MATERIALS & DESIGN, 2011, 32 (10) :5015-5021
[45]   Thermal stability of retained austenite in TRIP steels studied by synchrotron X-ray diffraction during cooling [J].
van Dijk, NH ;
Butt, AM ;
Zhao, L ;
Sietsma, J ;
Offerman, SE ;
Wright, JP ;
van der Zwaag, S .
ACTA MATERIALIA, 2005, 53 (20) :5439-5447
[46]   Phase transitions in an Fe-9Al-30Mn-2.0C alloy [J].
Wang, C. S. ;
Hwang, C. N. ;
Chao, C. G. ;
Liu, T. F. .
SCRIPTA MATERIALIA, 2007, 57 (09) :809-812
[47]   Strain hardening by dynamic slip band refinement in a high-Mn lightweight steel [J].
Welsch, E. ;
Ponge, D. ;
Haghighat, S. M. Hafez ;
Sandloebes, S. ;
Choi, P. ;
Herbig, M. ;
Zaefferer, S. ;
Raabe, D. .
ACTA MATERIALIA, 2016, 116 :188-199
[48]   Influence of Al content on the strain-hardening behavior of aged low density Fe-Mn-Al-C steels with high Al content [J].
Wu, Z. Q. ;
Ding, H. ;
An, X. H. ;
Han, D. ;
Liao, X. Z. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2015, 639 :187-191
[49]   Microstructural evolution and strain hardening behavior during plastic deformation of Fe-12Mn-8Al-0.8C steel [J].
Wu, Zhi Qiang ;
Ding, Hua ;
Li, Hua Ying ;
Huang, Ming Li ;
Cao, Fu Rong .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 584 :150-155
[50]   Solute-dislocation interactions and creep-enhanced Cu precipitation in a novel ferritic-martensitic steel [J].
Xiao, Bo ;
Xu, Lianyong ;
Cayron, Cyril ;
Xue, Jing ;
Sha, Gang ;
Loge, Roland .
ACTA MATERIALIA, 2020, 195 :199-208