可変拘束度型スリット割れ試験片の提案
1983 年 1 巻 1 号 p. 57-63
詳細
1983 年 1 巻 1 号 p. 57-63
The JIS-y root cracking specimen and H-slit restraint cracking specimen have been widely used in Japan in investigating cold cracking of steel weldments. While the former is small but possesses constant restraint, the latter is large and expensive.
In this report, the Controlled Restraint type Slit cracking specimen (CRS specimen) with slits at both edges of test welding line of JIS specimen is proposed, and the cold cracking tests are conducted after investigation of relation between slit length, restraint intensity, and stress. When these test data are arranged using restraint stress and residual diffusible hydrogen content of weld metal, a distinct line is found as the critical curve for cold cracking. Moreover the results are applied to actual weld procedures.
