Residual stress measurement in transient liquid phase-bonded steel components
Transient liquid phase bonding (TLPB) has a great potential to develop lower Residual stresses (RS) compared with arc welding processes. In TLPB, the whole joint is pre-heated to the process temperature - below the melting point of the base metal, held constant at this temperature during a pre-set time, and subsequently cooled to ambient temperature at a controlled cooling rate. The way in which heat is delivered allows the development of much lower cooling rates at the joint, which enables an increase in austenite transformation temperature, helping to relieve RS associated with this phase transformation. The outcome of the present experiment is to determine up to which extent diminishing cooling rates - by means of the TLPB process - reduces the development of RS at the joint and the heat affected zone in these welds. In order to carry out this experiment, we propose to measure RS with SALSA stress scanner in TLP-bonded steel bars of different grades - low carbon, medium carbon and low-alloyed steels - in the as-welded condition, for the longitudinal, hoop and radial directions.
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DI LUOZZO Nicolas; BOUDARD Michel; CABEZA Sandra; FONTANA Marcelo and VICENTE ALVAREZ Miguel Angel. (2020). Residual stress measurement in transient liquid phase-bonded steel components. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.DIR-169
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