In-Situ SEM Deformation Testing of Ni-Based Superalloy Heated by the Joule Heat

Proceedings

Liang, Jiecun¹  Wang, Zhen²  Li, Xide³ 

[1] Author to whom correspondence should be addressed.;Department of Engineering Mechanics, AML, Tsinghua University, Beijing 100084, China;Presented at the 18th International Conference on Experimental Mechanics (ICEM18), Brussels, Belgium, 1–5 July 2018.

关键词: in-situ SEM;    nickel-based superalloy;    joule heating;   

DOI  :  10.3390/ICEM18-05415

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

Studying the deformation and microstructure evolution for Ni-based single crystal alloys at high temperature has important effects on the design of turbine blades and disks. However, in-situ high temperature tests under scanning environment pose an important challenge for the current experimental conditions. In this paper, the resistance heating system was introduced into the high temperature fatigue experimental apparatus. The in-situ tensile test of 900 °C was successfully carried out. The experimental results showed that the crack initiation was mainly caused by inclusion debonding. The fracture mode was mainly characterized by the connection of micro holes.

【 授权许可】

CC BY