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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51653

Title: Size effect and strain induced double twin by nanoindentation in DSS weld metal of vibration-assisted GTAW
Authors: Chun-Hway Hsueh
Min-Jen Liao
Shing-Hoa Wang
Yu-Ting Tsai
Jer-Ren Yang
Rudder Wu
Woei-Shyan Lee
Contributors: 國立臺灣海洋大學:機械與機電工程學系
Keywords: Duplex stainless steel
Vibration assisted welding
V-shaped double twin
Date: 2018-11
Issue Date: 2018-12-14T02:44:39Z
Publisher: Materials Chemistry and Physics
Abstract: Abstract: The nanohardness values and modulus of the prior δ phase in both direct current (DC) and vibration-assisted (VIB) weld metal were higher than those of the base metal. The dislocation density in the δ phase matrix was the highest in the VIB weld metal, followed by the DC weld metal and the base metal. Therefore, the higher nanohardness value in the δ phase, especially for the VIB welding, was attributed to the existence of a higher dislocation density. By contrast, the nanohardness values of the γ phase in both weld metals were not affected by the welding process. The predicted nanohardness value of the composite phase with the rule-of-mixture was consistent with the result of nanoindentation measurements. The deformation induced a V-shaped double twin was revealed by the effect of nanoindentation on the austenite grain of the VIB weld metal.
Relation: 219 pp.40-50
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51653
Appears in Collections:[機械與機電工程學系] 期刊論文

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