Thermal Fatigue Life of Glidcop Al-15 High-Heat-Load Components

Abstract

Shanghai Synchrotron Radiation Facility (SSRF) is a third‐generation of synchrotron radiation light source and is presently under construction as a large scale national scientific project in China. Depending on the outstanding thermal and mechanical performance, Glidcop Al‐15, a dispersion strengthened copper alloy, is chosen to serve for the high‐heat‐load components at beam line front end in SSRF. Present study is to investigate the thermal fatigue lives of critical SSRF components. A nonlinear finite element method (FEM) is used to simulate the nonlinear three dimensional stress‐strain fields of the critical component‐Mask2 at SSRF beam line. The method consists of transient temperature analyses followed by elastic‐plastic stress analyses. Then, a critical plane approach is used to predict the thermal fatigue life of mask2. The critical plane approach is appropriate for estimating service life of critical SSRF components since the results are in good consistent with the experimental ones taken at the Advanced Photon Source (APS).