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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/49945

Title: Twinned Formation in Weld Metal of Titanium Bearing Nano Precipitated High Strength Steel
Authors: Ping-Wei Hsu
Fang-Hsin Kao
Shing-Hoa Wang
Jer-Ren Yang
Horng-Yi Chang
Yao-Ming Wang
Qian-Xuan Lin
Contributors: 國立臺灣海洋大學:輪機工程學系
Keywords: Carbides
Metals
Welding
Martensitic transformation
Date: 2012-10
Issue Date: 2018-09-04T02:35:02Z
Publisher: Materials Chemistry and Physics
Abstract: Abstract: The weld metal of titanium-bearing nano precipitated high-strength steel reveals that the allotriomorphic ferrite on the prior austenite grain boundary coarsens with increased welding heat input. Besides the welding penetration with depth-to-width ratio increases with heat input, the solidified weld metal microstructures, depending on various heat inputs, exhibit the microstructure constituents of allotriomorphic ferrite, very little Widmanstätten ferrite, acicular ferrite, and bainite. Dislocations formed and multiplied with higher welding heat-input, in accordance to residual stress induced by the temperature gradient field. The dislocation morphology is intertwined at the highest welding heat-input (3.0 kJ mm−1). Twin martensite forms under different welding heat inputs, and very little TiC re-precipitates in ferrite grains during the welding.
Relation: 136(2-3) pp.1103-1108
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/49945
Appears in Collections:[輪機工程學系] 期刊論文

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