材料期刊网

1. 首页
2. 检索结果页

原词结果 | 译词结果

CORRELATION BETWEEN MICROSTRUCTURE AND STRESS CORROSION CRACKING SUSCEPTIBILITY OF 2091 ALLOY

LJ Benshun Harbin Institute of Technology , Harbin , China CHEN Xiangping lianghan Petroleum Institute , Wuhan , China

金属学报(英文版)

The stress corrosion cracking(SCC) susceptibility of an Al-Li-Cu-Mg-Zr alloy(2091), heat-treated under different regime,has been investigated hy means of tensile tests at slow strain rate.The microstructure has been examined with TEM.The deformation characteristic has also been analysed.The stress corrosion resistance of the alloy was revealed to be mainly affected by the covering rate of T_2-phase over grain boundaries and by the average distance between T_2-phase particles. SCC resistance can be obviously improved by predeforming the alloy at room temper- ature to reduce the precipitation of T_2-phase along grain boundaries.

关键词: AI-Li alloy , null , null , null

INTERGRANULAR AND EXFOLIATION CORROSION BEHAVIOUR OF 8090Al-Li ALLOY

ZHANG Yun , LIU Yulin , ZHAO Hong' en , HU Zhuangqi , Institute of Metal Research , Academia Sinica , Shenyang , ChinaZHU Zhiyong , WANG Zhengfu , Institute of Corrosion and Protection of Metals , Academia Sinica , Shenyang , China ZHANG Yun , Associate Professor , Institute of Metal Research , Academia Sinica , Shenyang 110015 , China

金属学报(英文版)

The A1-2.79Li-1.3Cu-0.7Mg-0.12Zr(8090) alloy has excellent resistance to intergranular and exfoliation corrosion as naturally aged, worst as peak aged and rather better as underaged than as overaged. The corrosion behaviour of the alloy is closely dependent on its microstructure. Under the peak aging condition, the coarse T_2 phase, which is continuously distributed along grain boundaries, has so low corrosion potential in comparison with the ma- trix, this makes the corrosion resistance of the alloy to be deteriorated by anodic dissolution along grain boundaries.

关键词: AI-Li alloy , null , null , null

合金化中主要析出相对铝锂合金局部腐蚀的影响机制研究进展

易俊兰 , 陈磊 , 陈洁 , 朱瑞鑫 , 吴松林 , 宋袁曾

腐蚀与防护

综述了铝锂合金的合金化中形成的各种时效析出相及其对该类合金局部腐蚀的影响机制。

关键词: 铝锂合金 , 合金化 , 析出相 , 局部腐蚀

Fatigue Crack Growth of Al-Li Alloy 2091 in 3.5% NaCl Solution and at 130℃

HE Shiyu WANG Zhongguang LI Qingjian ZHANG Yun FENG Xiaozeng State Key Laboratory for Fatigue and Fracture of Materials , Institute of Metal Research , Academia Sinica , Shenyang , 110015 , ChinaDept.of Materials Science and Engineering , Harbin Institute of Technolo

材料科学技术（英）

A study has been made of the fatigue crack growth in an Al-Li alloy 2091 in 3.5%NaCl solu- tion and at an elevated temperature of 130℃.The aging and environmental effects on the crack growth behaviour were examined.It is shown that the fatigue crack growth resistance decreases with aging.The specimen with underaged structures shows the highest resistance to fatigue crack growth due to more deflected crack paths and the resulting high crack closure levels.As compared to laborato- ry air,both 3.5% NaCl solution and elevated tem- perature of 130℃ cause an increase of near-thresh- old crack growth rates and a decrease of threshold levels.The elevated temperature is more effective. The effect of elevated temperature is mainly due to the precipitate coarsening which results in an enhancement of slip irreversibility.Hydrogen embritttlement is supposed to be responsible for the degradation of fatigue crack growth resistance in 3.5%NaCl solution

关键词: fatigue crack growth , null , null

出版年份

刊物分类

相关作者

相关热词