![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
Vacuum brazing of austenitic stainless steel (SS) under stress with copper-based filler was carried out to assess the susceptibility of liquid metal embrittlement (LME) on stress. Dipping of the SS pipe into molten copper and CuSi3 was performed for comparison. The mechanisms of stress on Cu-SS LME and the effect of Si during cracking were discussed. Test results indicated that microcracks caused by stress concentration increase the possibility of LME. Furthermore, LME was suppressed by the Fe3Si layer between copper and SS. However, the melting range of the filler extended by the addition of Si increases the probability of LME for longer contacting. Accordingly, the addition of Si into copper-based filler should be avoided for most joining methods of SS with high stress concentration.
Disclosure statement
No potential conflict of interest was reported by the author(s).