Influence of Precipitate Size on the Strength of Nickel-Base Single Crystal Superalloys

被引：0

作者：

Wang Baizhi ^{[1
]}

Wen Zhixun ^{[1
]}

Liu Dashun ^{[1
]}

Yue Zhufeng ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Xian 710129P, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2015年 / 44卷 / 11期

关键词：

nickel-base single crystal superalloys; constitutive model; rowan stress; crystal plasticity; size effect; MECHANICAL-BEHAVIOR; HIGH-TEMPERATURES; DEFORMATION; PLASTICITY; MODEL;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of Ni3Al (gamma') precipitate size on the tensile properties of nickel-base single crystal superalloys was studied. For single crystal superalloys, the main contribution to the yield stress arises from the Orowan stress in the gamma channels. According to Orowan mechanism, a constitutive model based on crystal plastic theory was introduced to characterize the influence of precipitate size on the yield strength of single crystal superalloys. The tensile simulations of [001] and [111] Oriented specimens were carried out. The yield strength of single crystal superalloys with precipitate size varying from 0.2 to 2.5 lam was calculated and the simulation results agree with the experiments. This constitutive model is shown to accurately simulate the size effects in the nickel-base single crystal superalloys.

引用

页码：2747 / 2750

页数：4

共 15 条

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