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NTIS 바로가기Transactions of JWRI, v.11 no.2, 1982년, pp.67 - 77
Matsuda, Fukuhisa (Osaka Univ, Osaka, Jpn) , Nakagawa, Hiroji , Sorada, Kazuhiko
Dynamic behavior of solidification fronts and solidification cracking during welding of different steels has been observed with a high speed motion picture camera mounted on an optical microscope. The dynamic observation of the solidification front has revealed a very narrow apparent solidification temperature range compared with the true solidification temperature range. The dynamic observation of the solidification cracking in a rapid tensile test has revealed that crack initiation occurs at the high-temperature part of the true solidification temperature range and that the crack propagates toward both higher and lower temperature regions. These observations have been explained from the viewpoint of solidification theory. Moreover, a new concept of solidification cracking has been proposed on the basis of these observations.
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