Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Metals and Materials International, 2009, 15(6), , pp.1007-1015

Ort / Verlag

Springer: The Korean Institute of Metals and Materials

Erscheinungsjahr

2009

Quelle

Springer LINK 全文期刊数据库

Beschreibungen/Notizen

• 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 3 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.