6101铝合金时效过程中析出相对电阻率的影响  

The influences of precipitates on resistivity of 6101 aluminium alloy in aging

作　　者：刘振兴[1,2] 张新明[1,2] 唐建国[1,2] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]有色金属材料科学与工程教育部重点实验室,长沙410083

出　　处：《功能材料》2014年第2期119-123,128,共6页Journal of Functional Materials

基　　金：国家重大基础研究资助项目(2010CB731706);广东省产学研资助项目(2010A090200078)

摘　　要：采用硬度测试、原位电阻测试及 TEM等手段,研究了6101铝合金在175～195℃下时效析出相对相对电阻率（Δρ%）的影响,利用修正的马蒂森定则计算了175℃时不同时效时间析出相对相对电阻率的影响,得到了影响合金力学性能和导电率的温度时间判断依据。结果表明,随着温度的升高,时效初期团簇形成的时间越短,相对电阻率越低,硬度峰值也越低；175℃时效后期,析出相的密度增加,相间距减小,析出相对相对电阻率的影响基本稳定,导电率基本稳定。借助研究结果,确定了以力学性能优先和导电率优先的时效制度175℃/680 min 和195℃/220 min,性能测试显示选取依据合理。The influences of precipitates on relative resistivity of 6101 aluminium alloy in aging at 175-195℃was investigated by hardness-testing,in-situ resistivity testing and transmission electron microscopy（TEM）, and the modified Matthiessen’low was introduced to calculate the influence on resistivity at different aging time.Results about the aging temperature and time were gotten.It suggested that the shorter the forming time of clusters at the early stage of aging was,the lower the relative resistivity and the hardness was.At the later stage of aging at 1 7 5 ℃,the increasing of the density of precipitates leads to the decrease of the spacing,and the relative resistivity almost retains.From this research the aging treatment 175 ℃/680 min emphasizing on high strength and 195 ℃/220 min emphasizing on good conductivity were constituted and ensured reasonably by performance.

关 键 词：电阻率 6101Al-Mg-Si铝合金 时效 析出相 

分 类 号：TG166.3[金属学及工艺—热处理]