• 中文核心期刊
  • CSCD中国科学引文数据库来源期刊
  • 中国科技核心期刊
  • 中国机械工程学会材料分会会刊
Advanced Search
ZHANG Mengjun, XIA Weijun, CHEN Ding, WANG Xin, XIAO Di. Influence of Hot Extrusion on Microstructure and Properties of As-casted Mg-3.5Al-3.5Ca-0.6Mn Alloy[J]. Materials and Mechanical Engineering, 2017, 41(5): 32-37,42. DOI: 10.11973/jxgccl201705007
Citation: ZHANG Mengjun, XIA Weijun, CHEN Ding, WANG Xin, XIAO Di. Influence of Hot Extrusion on Microstructure and Properties of As-casted Mg-3.5Al-3.5Ca-0.6Mn Alloy[J]. Materials and Mechanical Engineering, 2017, 41(5): 32-37,42. DOI: 10.11973/jxgccl201705007

Influence of Hot Extrusion on Microstructure and Properties of As-casted Mg-3.5Al-3.5Ca-0.6Mn Alloy

More Information
  • Received Date: January 31, 2016
  • Revised Date: January 31, 2017
  • The influence of hot extrusion on the microstructure, mechanical properties and corrosion resistance of as-casted Mg-3.5Al-3.5Ca-0.6Mn alloy was investigated. The results show that hot extrusion could refine the structure of as-casted alloy with grain size from 80 μm to 6 μm after hot extrusion. The continuous network-like large second phases on grain boundaries were severely broken into micron even nanoscale particles and distributed like ribbons in the matrix. The ultimate tensile strength and elongation of hot extruded alloy were 313.9 MPa and 9.3%, which was higher than that of as cast alloy by 153.8% and 564.3%, respectively. After hot extrusion, the self-corrosion potential and arc radius of high-frequency capacity increased, while the self-corrosion current density and average hydrogen evolution rates decreased. The good corrosion resistance of matrix and grain boundaries caused by grain refinement, corrosion barrier caused by ribbon-like secondary phases and relatively stable and dense corrosion product film after grain refinement were responsible for higher corrosion resistance of hot extruded alloy.
  • [1]
    POLMEAR I J. Magnesium alloys and applications[J]. Materials Science and Technology, 1994, 10(1):1-16.
    [2]
    陈振华, 夏伟军, 严红革,等.镁合金[M]. 北京:化学工业出版社, 2004:19-22.
    [3]
    ZHANG L, DENG K, NIE K,et al. Microstructures and mechanical properties of Mg-Al-Ca alloys affected by Ca/Al ratio[J]. Materials Science and Engineering A, 2015, 636:279-288.
    [4]
    KIM Y M, YIM C D, KIM H S,et al. Key factor influencing the ignition resistance of magnesium alloys at elevated temperatures[J]. Scripta Materialia, 2011, 65(11):958-961.
    [5]
    LU Y, BRADSHAW A R, CHIU Y L,et al. Effects of secondary phase and grain size on the corrosion of biodegradable Mg-Zn-Ca alloys[J]. Materials Science and Engineering C, 2015, 48:480-486.
    [6]
    刘子利, 丁文江. 镁铝基耐热铸造镁合金的进展[J]. 机械工程材料, 2001, 25(11):1-4.
    [7]
    ZHANG Y, WU G, LIU W,et al. Effects of processing parameters and Ca content on microstructure and mechanical properties of squeeze casting AZ91-Ca alloys[J]. Materials Science and Engineering A, 2014, 595:109-117.
    [8]
    KANNAN M B, RAMAN R K S. In vitro degradation and mechanical integrity of calcium-containing magnesium alloys in modified-simulated body fluid[J]. Biomaterials, 2008, 29(15):2306-2314.
    [9]
    樊建锋, 杨根仓, 程素玲, 等. 含Ca阻燃镁合金的高温氧化行为[J].中国有色金属学报, 2004, 14(10):1666-1670.
    [10]
    张久文, 陈荣石, 周文龙, 等. 挤压AM50(-Ca)镁合金的显微组织与力学性能研究[J]. 材料科学与工艺, 2007, 15(1):141-144.
    [11]
    罗昊. AZ31镁合金挤压板材的力学性能和耐腐蚀性能[J]. 机械工程材料, 2013, 37(10):60-63.
    [12]
    XU S W, OH-ISHI K, KAMADO S,et al. High-strength extruded Mg-Al-Ca-Mn alloy[J]. Scripta Materialia, 2011, 65(3):269-272.
    [13]
    XU S W, OH-ISHI K, KAMADO S,et al. Effects of different cooling rates during two casting processes on the microstructures and mechanical properties of extruded Mg-Al-Ca-Mn alloy[J]. Materials Science and Engineering A, 2012, 542:71-78.
    [14]
    SUZUKI A, SADDOCK N D, JONES J W,et al. Solidification paths and eutectic intermetallic phases in Mg-Al-Ca ternary alloys[J]. Acta Materialia, 2005, 53(9):2823-2834.
    [15]
    宋佩维. 往复挤压Mg-4Al-4Si镁合金的显微组织与力学性能[J]. 中国有色金属学报, 2012, 22(7):1863-1870.
    [16]
    ZHOU D, LIU J, ZHANG J, et al. Structural stability of intermetallic compounds of Mg-Al-Ca alloy[J]. Transactions of Nonferrous Metals Society of China, 2007, 17(2):250-256.
    [17]
    王智祥, 谢建新, 刘雪峰, 等. 形变及时效对AZ91镁合金组织和力学性能的影响[J]. 金属学报, 2007, 43(9):920-924.
    [18]
    樊昱, 吴国华, 高洪涛, 等. La对AZ91D镁合金力学性能和腐蚀性能的影响[J]. 金属学报, 2006, 42(1):35-40.
    [19]
    LIU D, GUO C, CHAI L, et al. Mechanical properties and corrosion resistance of hot extruded Mg-2.5 Zn-1Ca alloy[J]. Materials Science and Engineering B, 2015, 195:50-58.
    [20]
    AUNG N N, ZHOU W. Effect of grain size and twins on corrosion behaviour of AZ31B magnesium alloy[J]. Corrosion Science, 2010, 52(2):589-594.
    [21]
    SONG G L, XU Z Q. The surface, microstructure and corrosion of magnesium alloy AZ31 sheet[J]. Electrochimica Acta, 2010, 55(13):4148-4161.
    [22]
    CAO F, SHI Z, SONG G L, et al. Influence of hot rolling on the corrosion behavior of several Mg-X alloys[J]. Corrosion Science, 2015, 90:176-191.

Catalog

    Article views (2) PDF downloads (0) Cited by()

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return