Hot Ductility Loss in a Fe-Ni-Based Superalloy

Metals

Chen-Wei Li¹  An-Chou Yeh¹  Chi-San Chen²  Woei-Ren Wang² 

[1] Department of Material Science and Engineering, National Tsing-Hua University (NTHU), Hsinchu 30013, Taiwan; E-Mail:;Nanopowder and Thin Film Technology Center, ITRI-South, Industrial Technology Research Institute, Chutung 31040, Taiwan; E-Mails:

关键词: superalloy;    incoloy A-286;    hot ductility loss;   

DOI  :  10.3390/met5042428

来源: mdpi

【 摘 要 】

High temperature tensile tests have been conducted on samples of a Fe-Ni based superalloy, Incoloy A-286, and significant ductility loss has been observed at 1220 °C. Titanium-rich, thin-film-like phase has been found on the inter-granular facets of fracture surfaces. It appears that sulfur content of Ti-rich phase was higher than that of the matrix. At 1220 °C, liquation of Ti-rich phases has resulted in thin-film-like morphology along the grain boundary and caused the ductility loss during tensile deformation.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.