不同时效工艺对6063铝合金组织和力学性能的影响
Effects of Different Ageing Processes on Microstructure and Mechanical Properties of 6063 Aluminum Alloy
摘 要
对6063铝合金分别进行了单级时效(180 ℃×6 h)和双级时效(170 ℃×2 h+200 ℃×1.5 h)处理, 研究了不同时效工艺对其组织和力学性能的影响。结果表明: 与单级时效相比, 合金经双级时效处理后的硬度、抗拉强度、屈服强度和伸长率等性能均更好; 单级时效处理后晶内析出相为亚稳β″相, 晶界析出平衡相明显球化, 且有明显的无沉淀析出带(PFZ); 双级时效处理后, 晶内β″相尺寸较单级时效的小, 晶界析出相呈断续状分布, PFZ较窄。
双级时效
β″相
组织
力学性能
6063 aluminum alloy
double step ageing
β″ phase
microstructure
mechanical property
Abstract
Single step ageing (180 ℃×6 h) and double step ageing (170 ℃×2 h+200 ℃×1.5 h) for 6063 aluminum alloy were carried out, and effects of different ageing processes on microstructure and mechanical properties were studied. The results show that hardness, tensile strength, yield strength and elongation of double step aged alloy were better than that of single step aged alloy. There were metastable β″ phases in transgranular and spheroidized precipitated phases at crystal boundaries, what′s more, an obvious precipitate-free-zone (PFZ) existed around grains boundary. After double step ageing, the β″ phase in transgranular was smaller, and precipitated phases at grain boundaries distributed discontinuouslies and PFZ was narrow.
中图分类号 TG166.3
所属栏目 试验研究
基金项目 湖南省自然科学基金资助项目(08JJ3101); 湖南省教育厅项目(09K103)
收稿日期 2012/1/28
修改稿日期 2012/12/22
网络出版日期
作者单位点击查看
备注宁爱林(1957-), 男, 湖南邵阳人, 教授, 博士。
引用该论文: NING Ai-lin,SUN Yu,HUANG Ji-wu. Effects of Different Ageing Processes on Microstructure and Mechanical Properties of 6063 Aluminum Alloy[J]. Materials for mechancial engineering, 2013, 37(3): 28～31
宁爱林,孙瑜,黄继武. 不同时效工艺对6063铝合金组织和力学性能的影响[J]. 机械工程材料, 2013, 37(3): 28～31
被引情况:
【1】高文理,闫豪,冯朝辉,陆政, "不同工艺时效后2A97铝锂合金的组织与性能",机械工程材料 38, 21-25(2014)
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【2】MURAYAMA M, HONO K, SAGA M, et al. Atom probe studied on the early stages of precipitation in Al-Mg-Si alloys［J］. Mater Sci Eng A,1998,250: 127-132.
【3】LODGAARD L, RYUM N. Precipitation of dispersoids containing Mn and/or Cr in Al-Mg-Si alloys［J］.Mater Sci Eng A, 2000, 283:144-152.
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【5】ZANDERGEN H W, ANDERSEN S J, JANSEN J. Structure dertermination of Mg5Si6 particles in Al by dynamic in electron diffraction studies［J］.Science,1997,277:1221-1223.
【6】EDWARDS G A, STILLER K, DUNLOP G L, et al. Transmission electron microscopy and differential scanning calorimetry studies on the precipitation sequence in an Al-Mg-Si alloys［J］.Acta Mater, 1998, 46:3893-1895.
【7】CHAKRABARTI D J, YINGGUO P, LAUGHLIN D E. Phase relations and precipitation in Al-Mg-Si alloy with Cu additions［J］.Mater Sci Forum,2002,392:857-159.
【8】WANG X, ESMAEILI D, LLOYD D J. On the precipitation-hardening behavior of the Al-Mg-Si-Cu alloy AA6111［J］.Metall Mater Trans A, 2006, 37: 2691-1693.
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