Effects of dynamic impact on mechanical properties and microstructure of special stainless steel weldments

Wuan Yun Hsiao; Shing Hoa Wang; Chih Yuan Chen; Jer Ren Yang; Woei Shyan Lee

doi:10.1016/j.matchemphys.2008.04.004

Effects of dynamic impact on mechanical properties and microstructure of special stainless steel weldments

Wuan Yun Hsiao, Shing Hoa Wang, Chih Yuan Chen, Jer Ren Yang, Woei Shyan Lee

機械工程學系

研究成果: Article › 同行評審

10 引文斯高帕斯（Scopus）

摘要

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 strain rate. The chemical composition affects the stacking fault energy coupled with adiabatic heat to determine the final structure of the impact.

原文	English
頁（從 - 到）	172-179
頁數	8
期刊	Materials Chemistry and Physics
卷	111
發行號	1
DOIs	https://doi.org/10.1016/j.matchemphys.2008.04.004
出版狀態	Published - 2008 9月 15

All Science Journal Classification (ASJC) codes

材料科學(全部)
凝聚態物理學

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10.1016/j.matchemphys.2008.04.004

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title = "Effects of dynamic impact on mechanical properties and microstructure of special stainless steel weldments",

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 strain rate. The chemical composition affects the stacking fault energy coupled with adiabatic heat to determine the final structure of the impact.",

author = "Hsiao, {Wuan Yun} and Wang, {Shing Hoa} and Chen, {Chih Yuan} and Yang, {Jer Ren} and Lee, {Woei Shyan}",

note = "Funding Information: This work was carried out with financial support from the National Science Council of ROC, Taiwan, grant NSC-93-2216-E-019-003. The authors gratefully acknowledge this support.",

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AU - Hsiao, Wuan Yun

AU - Wang, Shing Hoa

AU - Chen, Chih Yuan

AU - Yang, Jer Ren

AU - Lee, Woei Shyan

N1 - Funding Information: This work was carried out with financial support from the National Science Council of ROC, Taiwan, grant NSC-93-2216-E-019-003. The authors gratefully acknowledge this support.

PY - 2008/9/15

Y1 - 2008/9/15

N2 - 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 strain rate. The chemical composition affects the stacking fault energy coupled with adiabatic heat to determine the final structure of the impact.

AB - 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 strain rate. The chemical composition affects the stacking fault energy coupled with adiabatic heat to determine the final structure of the impact.

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JO - Materials Chemistry and Physics

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Effects of dynamic impact on mechanical properties and microstructure of special stainless steel weldments

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