Tensile Behavior and Microstructural Evolution of the Polycrystalline Nickel-Based Superalloy Applied in Turbine Disk

被引：1

作者：

Shen, Xiuli ^{[1
]}

Dong, Shaojing ^{[1
]}

Chen, Zhiying ^{[1
]}

机构：

[1] Beihang Univ, Sch Energy & Power Engn, 37 Xueyuan Rd, Beijing 100191, Peoples R China

来源：

INTERNATIONAL JOURNAL OF TURBO & JET-ENGINES | 2019年 / 36卷 / 03期

关键词：

tensile behavior; microstructural evolution; nickel-based superalloy; high temperature; uniaxial tension; DYNAMIC RECRYSTALLIZATION; TEMPERATURE; MECHANISMS;

D O I：

10.1515/tjj-2016-0075

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

In the present study, the mechanical behaviors and microstructural evolution of the nickel-based super-alloy FGH97 at different temperatures and strain rates were studied. First, the tensile tests were conducted at temperatures of 20 degrees C, 450 degrees C and 700 degrees C, respectively, at two specified strain rates of 0.00025 s(-1) and 0.001 s(-1). Second, the microscopic observations of the sections were carried out to analyze the microstructure feature. Based on the test data and the observations, it was found that the influence of strain rate on the deformation and elongation will be weakened at higher temperature. Furthermore, the phenomenon of stress serrations and the intermedia temperature brittleness were just observed at 450 degrees C, and the reason for that was investigated.

引用

页码：339 / 346

页数：8

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