Abstract
Since the method of X-ray stress measurement can be done by non-contact and non-destructive state, we can easily perform the measurement even if the temperature is high such as a few hundreds degree.
In this paper the thermal stress on heated clad steel by X-ray was measured. The result was that we could perform good stress measurement and could find a clear thermal stress cycle at even such a high temperature as 560°C.
Experimental results are as follows:
1) The clad steel hearted up to a temperature of 560°C showed a fine X-ray profile and gave a good correlation on 2θ-sin2ψ diagrams, so we could perform thermal stress measurement by the usual method.
2) In the heating process the thermal stress explained by thermal-expansion coefficient showed thermal stress explained by thermal-expansion coefficient showed thermal stress cycles, giving a terperature loop.
3) The stress value varied by removal of oxide film.
