抄録
This investigation was made to establish a new testing method for cold cracking of weld metal of high strength steels such as HT60, HT80 and HY130. This test was named the LB-TRC (Longitudinal Bead-TRC) test.
The effect of loading temperature on the lower critical stress was studied and moreover the lower critical stress obtained by the LB-TRC test was compared with that obtained by the conventional TRC test. On the other hand, fractographic investigation of this test was undertaken.
Consequently, it was shown that the lower critical stress and the fracture mode in the LB-TRC tested specimen were approximately equal to those obtained in the conventional TRC test and that the LB-TRC test was useful to evaluate cold cracking susceptibility of weld metal.
