Investigation on Solidification Process Fracture Surface Observation of Aluminum Alloy Welds Specimen Broken by High Speed Breaking Test

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概要

• 論文の詳細を見る

• Behavior of TIG arc spot welds of an Al alloy A5083 thin plate during cooling and solidification process was investigated by the following methods. Temperature of welds was measured during heating and cooling process by using very slender thermocouples. Weld specimen was broken any time during cooling and solidification process by using a high speed breaking apparatus. Afterwards, morphological macro-and microstructures of fracture surface were observed using the electron microscope. The results obtained are as follows: 1) There developed a liquefied grain boundary, which is called a brittle zone, and a partial liquefied grain boundary, which is called a low ductility zone, in HAZ when some time elapsed after arc stop. 2) Solidification end was determind by confirming disappearance of liquid phase on fracture surface. As a result, it was found that the temperature of solidification end weld metal was considerabl lower (440〜425℃) than solidus temperature (579℃) of base metal. 3) CCSP diagram was obtained from fractography analysis by determining solidification end, which was difficult to determine from analysis of cooling and solidification curve.

• 社団法人溶接学会の論文
• 1993-10-01

著者

• Ohta Shozaburo

  Musashi Institute of Technology

• Asai Kimioku

  Musashi Institute of Technology

関連論文

• Root Failure Resulting from Toe Treatment of Non-Load-Carrying Cruciform Fillet Welded Joints
• The Behavior of Temperature Decreasing and Fraction Solid Increasing in Solid-Liquid Coexisting Zone in Solidification Process of Aluminum Alloy Weld Metal
• Investigation on Solidification Process Fracture Surface Observation of Aluminum Alloy Welds Specimen Broken by High Speed Breaking Test

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