Effect of Ti addition on the microstructure and mechanical properties of cast Mg-Gd-Y-Zn alloys

被引：47
作者：
Cheng, Peng [1 ]
Zhao, Yuhong [1 ]
Lu, Ruopeng [1 ]
Hou, Hua [1 ]
Bu, Zhiqiang [1 ]
Yan, Feng [1 ]
机构：
[1] North Univ China, Coll Mat Sci & Engn, Taiyuan 030051, Shanxi, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 708卷
基金：
山西省青年科学基金; 中国国家自然科学基金;
关键词：
Magnesium alloys; Long-period stacking ordered; Grain refinement; Microstructure; Mechanical properties; STACKING ORDERED STRUCTURES; HIGH-STRENGTH; TENSILE PROPERTIES; GRAIN-REFINEMENT; MAGNESIUM ALLOY; SOLID-SOLUTION; HEAT-TREATMENT; COOLING RATE; ZR ALLOYS; AS-CAST;
D O I：
10.1016/j.msea.2017.10.006
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of Ti addition on the microstructure and mechanical properties of cast Mg-Gd-Y-Zn alloys was investigated. Ti exhibited a refinement effect comparable to that of Zr in the as-cast condition. With the increase of Ti content, the phenomenon of grain refinement and homogenization was more obvious, especially for solution treated alloys. The finest grains were obtained with 0.8 wt% Ti and were composed of a-Mg and refined Mgs(Gd, Y, Zn) in the as-cast structure. Zr and Ti could be found along the grain boundaries. After solid solution treatment, Zr was still concentrated in the vicinity of the grain boundaries, while Ti was uniformly dispersed in the a Mg matrix. The Ti-refined alloys exhibited superior grain size stability and mechanical properties. In addition, the mechanical properties of the considered alloys were improved due to the transition from Mgs(Gd, Y, Zn) to long-period stacking ordered (LPSO) phase during the heat treatment. Subsequent aging at 220 degrees C resulted in remarkable precipitation hardening and consequently the strength was significantly improved. The Ti-refined alloy exhibited higher ultimate tensile strength and elongation than the alloy containing the same amount of Zr, with an increase of 20 MPa and 29%, respectively.
引用
收藏
页码：482 / 491
页数：10
相关论文
共 37 条
  • [21] Microstructure evolutions of rapidly-solidified and conventionally-cast Mg97Zn1Y2 alloys
    Ono, Akira
    Abe, Eiji
    Itoi, Takaomi
    Hirohashi, Mitsuji
    Yamasaki, Michiaki
    Kawamura, Yoshihito
    [J]. MATERIALS TRANSACTIONS, 2008, 49 (05) : 990 - 994
  • [22] The effect of Ti and Zr elements and cooling rate on the microstructure and tensile properties of a new developed super high-strength aluminum alloy
    Pourkia, N.
    Emamy, M.
    Farhangi, H.
    Ebrahimi, S. H. Seyed
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (20): : 5318 - 5325
  • [23] Rokhlin L.L., 2004, SCRIPTA MATER, V51, P107
  • [24] Suryanarayana C., 2000, MICROSTRUCT PROP MAT, V2
  • [25] Microstructures and mechanical properties of as-cast Mg-5Al-0.4Mn-xNd (x=0, 1, 2 and 4) alloys
    Wang, Jianli
    Yang, Jie
    Wu, Yaoming
    Zhang, Hongjie
    Wang, Limin
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 472 (1-2): : 332 - 337
  • [26] Grain refinement of AZ31 magnesium alloy by titanium and low-frequency electromagnetic casting
    Wang, Yingxin
    Zeng, Xiaoqin
    Ding, Wenhang
    Luo, Alan A.
    Sachdev, Anil K.
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2007, 38A (06): : 1358 - 1366
  • [27] A high strength and good ductility Mg-Y-NI-TI alloy with long period stacking ordered structure processed by hot rolling and aging treatment
    Wu, Shouzhong
    Zhang, Jinshan
    Zhang, Zhifu
    Xu, Chunxiang
    Nie, Kaibo
    Niu, Xiaofeng
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2015, 648 : 134 - 139
  • [28] The microstructure evolution with lamellar 14H-type LPSO structure in an Mg96.5Gd2.5Zn1 alloy during solid solution heat treatment at 773 K
    Wu, Y. J.
    Zeng, X. Q.
    Lin, D. L.
    Peng, L. M.
    Ding, W. J.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 477 (1-2) : 193 - 197
  • [29] Effect of cooling rate on the microstructure evolution and mechanical properties of homogenized Mg-Gd-Y-Zn-Zr alloy
    Xu, C.
    Zheng, M. Y.
    Wu, K.
    Wang, E. D.
    Fan, G. H.
    Xu, S. W.
    Kamado, S.
    Liu, X. D.
    Wang, G. J.
    Lv, X. Y.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 559 : 364 - 370
  • [30] Mechanical properties of warm-extruded Mg-Zn-Gd alloy with coherent 14H long periodic stacking bordered structure precipitate
    Yamasaki, M
    Anan, T
    Yoshimoto, S
    Kawamura, Y
    [J]. SCRIPTA MATERIALIA, 2005, 53 (07) : 799 - 803
1234