Microstructure and mechanical properties of high strength die-casting Al-wMg-Si-Mn alloy

被引：41
|
作者：
Hu, Zuqi [1 ]
Wan, Li [1 ]
Wu, Shusen [1 ]
Wu, Han [1 ]
Liu, Xueqiang [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China
来源：
MATERIALS & DESIGN | 2013年 / 46卷
关键词：
High-pressure die casting; Aluminum alloys; Mechanical properties; Fatigue fracture; ALUMINUM-ALLOYS; BEHAVIOR; POROSITY; FE;
D O I：
10.1016/j.matdes.2012.10.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Die casting Al-Mg-Si-Mn alloy, with good strength and toughness, has a bright prospect for the mass production of automotive security components. Effects of magnesium content and age treatment on fatigue and mechanical properties of AlMgxSi2Mn (x = 5.7-7.2%) alloys are studied to broaden their application and improve mechanical properties further. Tensile and fatigue tests were conducted on as-cast and age treated (250 degrees C/1h) AlMg5.5Si2Mn samples. Microstructure and fracture surface of those alloys are analyzed by SEM, XRD, EDXS and optical microscope (OM). Results indicated that as the magnesium content varied from 5.7% to 7.2%, yield strength and hardness increased 11% and 9%, while elongation decreased dramatically from 8.31% to 4.52%, respectively. Ultimate tensile strength and yield strength of AlMg5.5Si2Mn alloy increased 14% and 29% respectively, after the age treatment. Fatigue limits increased from 57 MPa to 75 MPa with enhanced magnesium contents. Surface pores and plastic deformation are dominantly responsible for the failure. Microstructure of AlMgxSi2Mn alloy consists of alpha-Al, Mg2Si, beta-Al3Mg2 and a small amount of Al-15(Fe, Mn)(3)Si-2 particles distributed along the grain boundaries. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：451 / 456
页数：6
相关论文
共 50 条
  • [21] Microstructures, mechanical properties, and corrosion behavior of novel high-thermal-conductivity hypoeutectic Al-Si alloys prepared by rheological high pressure die-casting and high pressure die-casting
    Kang, Yonglin (kangylin@ustb.edu.cn), 1600, Elsevier Ltd (749):
  • [22] Effect of Si and Mn on Microstructure and Mechanical Properties of Vacuum Suction Casting Al-4.5Cu Alloy
    He, T.
    Liu, H. J.
    Shi, X. J.
    Huo, Y. M.
    Min, L.
    Pan, T. T.
    STRENGTH OF MATERIALS, 2018, 50 (04) : 665 - 673
  • [23] Effect of Si and Mn on Microstructure and Mechanical Properties of Vacuum Suction Casting Al–4.5Cu Alloy
    T. He
    H. J. Liu
    X. J. Shi
    Y. M. Huo
    L. Min
    T. T. Pan
    Strength of Materials, 2018, 50 : 665 - 673
  • [24] Microstructure and mechanical properties of die-casting ADC12+x(La+Yb) alloy
    Song, Xian-Chen
    Yan, Hong
    INTERNATIONAL JOURNAL OF CAST METALS RESEARCH, 2020, 33 (2-3) : 80 - 88
  • [25] Microstructure, Mechanical Properties and Die-Filling Behavior of High-Performance Die-Cast Al–Mg–Si–Mn Alloy
    Zu-Qi Hu
    Xin-Jian Zhang
    Shu-Sen Wu
    Acta Metallurgica Sinica (English Letters), 2015, 28 : 1344 - 1353
  • [26] HIGH-PRESSURE DIE-CASTING - EFFECT OF FLUID-FLOW ON THE MICROSTRUCTURE OF LM24 DIE-CASTING ALLOY
    GHOMASHCHI, MR
    JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1995, 52 (2-4) : 193 - 206
  • [27] Influence of High-Speed Ram Transition Position on Porosity and Mechanical Properties of Large One-Piece Die-Casting Al-Si-Mn-Mg Aluminium Alloy
    Zhang, Sai
    Ren, Pengfei
    Wang, Kangle
    Liu, Bo
    Meng, Xianming
    Materials, 2024, 17 (24)
  • [28] Effects of heat treatment on microstructure and mechanical properties of Mg-7Al-2Sn alloy prepared by vacuum die-casting
    School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, China
    不详
    Cailiao Rechuli Xuebao, (72-77):
  • [29] Simulation optimization of die-casting process, microstructure and mechanical properties of Al-7Si-0.35Mg-0.1Ti alloys
    Liu W.-C.
    Ding D.-H.
    Wang Y.-B.
    Lu Y.-J.
    Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals, 2021, 31 (09): : 2357 - 2370
  • [30] A novel die-casting Mg alloy with superior performance: Study of microstructure and mechanical behavior
    Bai, Yang
    Ye, Bing
    Wang, Liyang
    Zhao, Beibei
    Yu, Xin
    Lu, Yong
    Kong, Xiangyang
    Ding, Wenjiang
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2021, 802
12345