Control of microstructure and segregation in a solidifying eutectic alloy

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420153
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Kanazawa University
• Principal Investigator: KIMURA Shigeo 金沢大学, 環日本海域環境研究センター, 教授 (70272953)
• Co-Investigator(Kenkyū-buntansha): MONZEN RYOICHI 金沢大学, 理工学域機械工学系, 教授 (20166466) ; KOMATSU NOBUYOSHI 金沢大学, 理工学域機械工学系, 准教授 (20436827)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 共晶合金 / 凝固速度 / 組織制御 / 組成制御 / 伝熱工学

Outline of Final Research Achievements

Molten eutectic alloy metal, based on Zn-Sn mixture, was made in a cylindrical electrically heated furnace. The molten alloy was then cooled from above, with a disc-type temperature-controllable cooling object. The vertical temperature distributions below the cooling surface were monitored during the solidification process. The solidifying speeds were then computed, assuming that the eutectic temperature corresponds to the solidifying boundary. The small specimens taken at different vertical positions were analyzed with microscope. A clear correlation between the dendrite arm intervals and the computed solidifying speeds is observed. This proves that the micro-structure of the solid layer can be controlled by a temperature-controlled cooling surface.

Free Research Field

機械工学