Creep of stainless steel under heat flux cyclic loading (500–1000°C) with different mechanical preloads in a vacuum environment using 3D-DIC

DOI number:10.12989/sss.2019.24.6.759

Abstract:In nuclear fusion reactors, the key structural component (i.e., the plasma-facing component) undergoes high heat flux cyclic loading. To ensure the safety of fusion reactors, an experimental study on the temperature-induced creep of stainless steel under heat flux cyclic loading was performed in the present work. The strains were measured using a stereo digital image correlation technique (3D-DIC). The influence of the heat haze was eliminated, owing to the use of a vacuum environment. The specimen underwent heat flux cycles (500 °C–1000 °C) with different mechanical preloads (0 kN, 10 kN, 30 kN, and 50 kN). The results revealed that, for a relatively large preload (for example, 50 kN), a single temperature cycle can induce a residual strain of up to 15000 microstrain.

Indexed by:Journal paper

Document Type:J

Volume:24

Issue:6

Page Number:759-768

Translation or Not:no

Date of Publication:2019-12-25

Included Journals:SCI

Links to published journals:http://koreascience.or.kr/article/JAKO201933762688546.page