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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/23800

Title: Impact deformation behavior of duplex and superaustenitic stainless steels welds by split Hopkinson pressure bar
Authors: Shing-Hoa Wang;Chih-Sheng Huang;Woei-Shyan Lee;Tao-Hsing Chen;Chia-Chang Wu;Charles Lien;Hung-Yin Tsai
Contributors: NTOU:Department of Mechanical and Mechatronic Engineering
Keywords: superaustenitic stainless steel duplex stainless steel;high strain rate impact;weldment;strain-induced phase transformation
Date: 2009-12-01
Issue Date: 2011-10-20T08:08:18Z
Publisher: Metals and Materials International
Abstract: abstract:A considerable volume of γ phase increases in the fusion zone (weld metal) for two duplex stainless steels after a high-strain-rate impact. The strain-induced γ phase formation in the fusion zone results in local hardness variation depending on the strain rate. The α phase content in the fusion zone decreases as the impact strain rate increases for SAF 2205 DSS and SAF 2507 DSS. The results of the two-phase content measured by Ferritoscope correspond to that assessed by image analyses. In contrast, superaustenite stainless steel is unaffected by such an impact owing to its fully stable austenization. Impacted welds at a high strain rate of 5 × 103 s−1 reveal feather-like surface creases along the solidified curved columnar grain boundaries. The apparent surface creases are formed due to the presence of diffuse Lüders bands, which are caused by heavy plastic deformation in coarse-grain materials.
Relation: 15(6), pp.1007-1015
URI: http://ntour.ntou.edu.tw/handle/987654321/23800
Appears in Collections:[機械與機電工程學系] 期刊論文

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