The Effect of Friction Stir Processing Speed Ratio on the Microstructure and Mechanical Properties of A ۴۳۰ Ferritic Stainless Steel
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JMATPR-2-2_005
تاریخ نمایه سازی: 12 مهر 1400
Abstract:
This study is an attempt to investigate the effect of welding rotational and traverse speed on mechanical and microstructural properties of A ۴۳۰ stainless steel in order to give an effective processing window to achieve an appropriate microstructure and so mechanical properties. There are a wide range industrial uses for ferritic stainless steel. There from they have some problems like grain coarsening and martensitic transformation during conventional fusion welding, solid state welding methods has found a great interest. A heavy duty NC machine is used for FSW. Water cooled brass chamber is used to prevent the tool from severe wear and damage. In order to study the effect of rotational to welding speed ratio ( ) on microstructure, rotational speeds of ۶۰۰, ۸۰۰ rpm and welding speeds of ۵۰, ۱۰۰, ۱۵۰, ۲۰۰ mm/min with a spindle tilt angle of ۳° are selected. Results showed that ferrite grain size decreased by increasing welding speed at constant rotational speeds which prove dynamic recrystallization occurrence in the nugget zone. Mechanical tests showed that strength and hardness of weld zone in increased compared to base metal.
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Authors
Ali Salemi Golezani
Department of Materials Engineering, Islamic Azad University - Karaj Branch, Karaj, Iran
S. M Arab
Department of Materials Engineering, Islamic Azad University - Karaj Branch, Karaj, Iran
Sh. Javadi
Department of Materials Engineering, Islamic Azad University - Karaj Branch, Karaj, Iran
Firooz Kargar
Department of Materials Engineering, Tarbiat Modares University, Tehran, Iran
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