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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/23793

Title: Effects of dynamic impact on mechanical properties and microstructure of special stainless steel weldments
Authors: Wuan-Yun Hsiao;Shing-Hoa Wang;Chih-Yuan Chen;Jer-Ren Yang;Woei-Shyan Lee
Contributors: NTOU:Department of Mechanical and Mechatronic Engineering
Keywords: Twinning;Martensite;Stacking fault;Dynamic impact;Weld metal
Date: 2008-09
Issue Date: 2011-10-20T08:08:16Z
Publisher: Materials Chemistry and Physics
Abstract: Variations in weld metal microstructure after impact at different strain rates for three weld metals, SAF 2507 DSS, SAF 2205 DSS and 254 SMO steel, are addressed. The twin grain forms that appear inside the γ grain of duplex stainless steel at low impact strain rates may be caused by adiabatic heat. The needle-like or thick streak-like twins occur in the γ grain of duplex stainless steel, caused by shear stress at a high strain rate. The impact induces dislocation loop formation in the γ phase of 254 SMO steel at low strain rate, but martensite is produced at a high Abstract:strain rate. The chemical composition affects the stacking fault energy coupled with adiabatic heat to determine the final structure of the impact.
Relation: 111(1), pp.172–179
URI: http://ntour.ntou.edu.tw/handle/987654321/23793
Appears in Collections:[機械與機電工程學系] 期刊論文

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