| 2091合金的显微组织与应力腐蚀敏感性 |
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| 引用本文： | 李仁顺,陈想平.2091合金的显微组织与应力腐蚀敏感性[J].金属学报,1992,28(6):59-64. |
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| 作者姓名： | 李仁顺 陈想平 |
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| 作者单位： | 哈尔滨工业大学，江汉石油学院 哈尔滨(150006) |
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| 摘 要： | 用慢应变速率拉伸试验研究不同热处理状态Al—Li—Cu—Mg—Zr(2091)合金的应力腐蚀敏感性,用透射电镜观察显微组织结构并分析变形特性。结果指出,T_2相在晶界上的复盖程度及T_2相之间的平均间距是影响合金应力腐蚀敏感性的主要因素,室温预形变处理可减少晶界上T_2相的数量,使合金应力腐蚀抗力得到明显提高。
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| 关 键 词： | Al－Li合金 应力腐蚀 预形变 |
| 收稿时间： | 1992-06-18 |
| 修稿时间： | 1992-06-18 |
CORRELATION BETWEEN MICROSTRUCTURE AND STRESS CORROSION CRACKING SUSCEPTIBILITY OF 2091 ALLOY |
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| LI Renshun,CHEN Xiangping Harbin Institute of Technology Jianghan petroleum Institute Correspindent Post Box No.,Harbin Institute of Technology,Harbin.CORRELATION BETWEEN MICROSTRUCTURE AND STRESS CORROSION CRACKING SUSCEPTIBILITY OF 2091 ALLOY[J].Acta Metallurgica Sinica,1992,28(6):59-64. |
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| Authors: | LI Renshun CHEN Xiangping Harbin Institute of Technology Jianghan petroleum Institute Correspindent Post Box No Harbin Institute of Technology Harbin |
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| Abstract: | The stress corrosion cracking (SCC) susceptibility of an Al-Li-Cu-Mg-Zr al-
loy (2091), heat-treated under different regimes, has been investigated by means of tensile test
at slow strain rate. The microstructures has been examined with TEM. The deformation be-
havior has also been analysed. The stress corrosion resistance of the alloy was revealed to be
mainly affected by the covering of T_2-phase over grain boundaries and by the average dis-
tance between T_2-phase particles. An improvement of SCC resistance may be obviously made
by pre-deforming the alloy at room temperature to reduce the precipitation of T_2-phase
along grain boundaries. |
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| Keywords: | Al-Li alloy stress corrosion microstructure pre-deformation |
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