Achieving exceptional ultrahigh-strength in low-alloy Mg-1Al-1Ca-0.4Mn (wt%) alloy by regulating bimodal microstructure

被引：8
作者：
Liu, Xiaoqing [1 ,2 ]
Qiao, Xiaoguang [1 ]
Ye, Liyao [2 ]
Zhang, Xianke [2 ]
Zheng, Mingyi [1 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
[2] Gannan Normal Univ, Sch Phys & Elect, Ganzhou 341000, Peoples R China
来源：
MATERIALS TODAY COMMUNICATIONS | 2023年 / 36卷
基金：
中国国家自然科学基金;
关键词：
Mg -Al -Ca -Mn alloy; Ultrahigh strength; Bimodal microstructure; Ultrafine grain; MECHANICAL-PROPERTIES;
D O I：
10.1016/j.mtcomm.2023.106710
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A Mg-1Al-1Ca-0.4Mn (AXM1104, wt%) alloy extruded at 250 & DEG;C with a ram speed of 0.1 mm/s obtains a unique bimodal microstructure. As-extruded alloy exhibits a high tensile yield strength (YS) of 474 MPa but a low ductility of 2.1%, in which the YS exceeds conventionally extruded rare-earth-free Mg alloys reported so far. After annealing at 300 & DEG;C for 10 min, the annealed alloy achieves a good strength-ductility balance, with a YS of 426 MPa and an elongation of 5.4%. The ultrahigh YS of the as-extruded alloy is attributed to the combined strengthening efect of grain boundary, dislocation and texture, while the as-annealed alloy is mainly strength-ened by both grain boundary strengthening and precipitation strengthening from planar Al2Ca nano phase.
引用
收藏
页数：5
相关论文
共 20 条
[1]   Rational design of a lean magnesium-based alloy with high age-hardening response [J].
Cihova, M. ;
Schaeublin, R. ;
Hauser, L. B. ;
Gerstl, S. S. A. ;
Simson, C. ;
Uggowitzer, P. J. ;
Loeffler, J. F. .
ACTA MATERIALIA, 2018, 158 :214-229
[2]   Fabrication of biodegradable materials with high strength by grain refinement of Mg-0.3 at.% Ca alloys [J].
Ikeo, Naoko ;
Nishioka, Masayuki ;
Mukai, Toshiji .
MATERIALS LETTERS, 2018, 223 :65-68
[3]   Enhanced strength by precipitate modification in wrought Mg-Al-Ca alloy with trace Mn addition [J].
Li, Z. T. ;
Qiao, X. G. ;
Xu, C. ;
Liu, X. Q. ;
Kamado, S. ;
Zheng, M. Y. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2020, 836
[4]   Ultrahigh strength Mg-Al-Ca-Mn extrusion alloys with various aluminum contents [J].
Li, Z. T. ;
Qiao, X. G. ;
Xu, C. ;
Kamado, S. ;
Zheng, M. Y. ;
Luo, A. A. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 792 :130-141
[5]   Effect of Ca/Al ratio on microstructure and mechanical properties of Mg-Al-Ca-Mn alloys [J].
Li, Z. T. ;
Zhang, X. D. ;
Zheng, M. Y. ;
Qiao, X. G. ;
Wu, K. ;
Xu, C. ;
Kamado, S. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2017, 682 :423-432
[6]   Influence of grain size on microstructure, mechanical properties and strain hardening behavior of Mg-0.3Ca (wt.%) alloy [J].
Liu, X. Q. ;
Qiao, X. G. ;
Xie, W. C. ;
Pei, R. S. ;
Yuan, L. ;
Zheng, M. Y. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2022, 839
[7]   Role of extrusion rate on the microstructure and tensile properties evolution of ultrahigh-strength low-alloy Mg-1.0Al-1.0Ca-0.4Mn (wt.%) alloy [J].
Liu, X. Q. ;
Qiao, X. G. ;
Pei, R. S. ;
Chi, Y. Q. ;
Yuan, L. ;
Zheng, M. Y. .
JOURNAL OF MAGNESIUM AND ALLOYS, 2023, 11 (02) :553-561
[8]   Effect of Er contents on the microstructure of long period stacking ordered phase and the corresponding mechanical properties in Mg-Dy-Er-Zn alloys [J].
Liu, X. Q. ;
Zhao, D. S. ;
Ye, L. ;
Zhuang, Y. L. ;
Gao, S. B. ;
Wang, J. B. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2018, 718 :461-467
[9]  
Liu X.Q., 2023, J MATER RES TECHNOL, V25, P1164
[10]   High strength and excellent ductility of dilute Mg-0.68Al-0.32Ca-0.50Mn (wt%) extrusion alloy obtained by T6 treatment [J].
Liu, Xiaoqing ;
Qiao, Xiaoguang ;
Li, Zitong ;
Zheng, Mingyi .
MATERIALS CHARACTERIZATION, 2020, 162
12