The Behavior of Temperature Decreasing and Fraction Solid Increasing in Solid-Liquid Coexisting Zone in Solidification Process of Aluminum Alloy Weld Metal

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概要

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• It is the ultimate purpose of this investigation to elucidate the fundamental phenomena in cooling and solidification process and to establish reasonably the methos of estimating hot cracking sensitivity and preventing aluminum alloy weld from hot cracking. In this raport, temperature measurement was carried out by CA thermocouple in cooling and solidification process on TIG arc spot welds of commercial aluminum alloys 2024 and 5083 and various analyses were performed. On the basis of the measured value, the authors made Continuous Cooling Solidification Process diagram (CCSP diagram) showing the relation among passed time from arc stop, phase change and the position of welds. By using the CCSP diagram, the authors could investigate the solidification process of the welds. With regard to fraction solid cooling rate (cooling rate in solid-liquid coexisting zone), it was found that the cooling rate at every definite fraction solid was more meaningful than one in a whole solidification time. Increasing behavior of fraction solid was very different between 2024 and 5083 Al alloy at the latter stage of solidification process in the molten pool.

• 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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