EFFECT OF PRE-DEFORMATION ON THE MICROSTRUCTURE OF AL- 5%Ti-B GRAIN REFINED AL2014 ALLOY IN THE SIMA PROCESS
Publish place: 1st International and 6th Joint Conference of Iranian Society of Metallurgical Engineers and the scientific community of Casting
Publish Year: 1391
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
IMES06_061
تاریخ نمایه سازی: 8 بهمن 1391
Abstract:
Achieving a globular microstructure before conducting semi-solid forming (SSF) techniques has a great influence on final properties. In this research Al2014 alloy with a globular microstructure was producedvia new strain induced melt activation (SIMA) process. In order to study the effect of pre-deformation in the SIMA process, various height reduction percentages (HR%) (10%, 20% and 30%) were applied on specimens through cold upsetting. Cold worked specimens were heat treated up to 635 oC, for 30 minutesand then quenched in cold water. Observation with optical and scanning electron microscopy (SEM)showed that by increasing the height reduction percentage, average grain size decreases significantly.Further results showed that with increasing height reduction percentage, sphericity increases to some extent
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Authors
M. Amuei
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, P.O. Box: ۱۴۳۹۵-۷۳۱, Iran
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