Abstract
Continued from the preceding paper, the mild steel rectangular plates, which had a weld bead along one edge as shown in Fig.1, were local-heated by a gas flame.
The residual stresses at the Point 1 and 4 in both directions parallel to and perpendicular to the welded edge were measured by the X-ray diffraction method before and after local heating. The stress near the weld was reduced to a small value by local heating similarly in the preceding paper, and the one around the heated zone was repressed to a relatively small tension. Simultaneously, the lengthes of aa, bb and cc were measured. And these dimensions were found to be dilated by local heating.
These findings enabled the author to clarify the mechanism of stressrelieving by local heating qualitatively.
