Impact deformation behavior of duplex and superaustenitic stainless steels welds by split hopkinson pressure bar

Shing Hoa Wang, Chih Sheng Huang, Woei Shyan Lee, Tao Hsing Chen, Chia Chang Wu, Charles Lien, Hung Yin Tsai

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

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 × 10 3s-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.

原文English
頁(從 - 到)1007-1015
頁數9
期刊Metals and Materials International
15
發行號6
DOIs
出版狀態Published - 2009 12月

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學
  • 材料力學
  • 金屬和合金
  • 材料化學

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