2013 Fiscal Year Final Research Report

Evaluation of solidification during welding by in-situ observation and simulation and development of prevention technique for solidification cracking

Research Project

Project/Area Number	24760601
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Material processing/treatments
Research Institution	Hiroshima University
Principal Investigator	KADOI KOTA 広島大学, 工学(系)研究科(研究院), 助教 (40454029)
Project Period (FY)	2012-04-01 – 2014-03-31
Keywords	溶接接合 / 凝固工学 / その場観察 / 高温割れ / 凝固割れ
Research Abstract	The aim of this work is for quantitative evaluation of solidification cracking susceptibility during and for investigation of prevention the crack initiation. Evaluation test for hot cracking susceptibility by In-situ observation using high speed camera enabled quantitative measurement the strain and temperature with high accuracy under rapid solidification during laser welding. It was possible to observe distribution morphology of residual liquid at the end of molten pool directly by high magnification in-situ observation technique. In addition, the tendency of the morphology had good agreement with the tendency of the solidification cracking susceptibility.

(4 results)