Microstructure Evolution of Electron Beam Physical Vapour Deposited Ni-23.5Cr-2.66Co-1.44Al Superalloy Sheet During Annealing at 600 °C

Materials Research

Li Mingwei²  Zeng Gang¹  Zhong Yesheng¹  He Fei¹  He Xiaodong¹ 

[1] ,Harbin Institute of Technology National Key Lab for Precision Heat Processing of Metal Harbin,China

关键词: Physical Vapour Deposited (EB-PVD);    Ni-based superalloy;    annealing;    microstructure;   

DOI  :  10.1590/S1516-14392012005000145

来源: SciELO

【 摘 要 】

Microstructure evolution of electron beam physical vapour deposited (EB-PVD) Ni‑23.5Cr‑2.66Co‑1.44Al superalloy sheet during annealing at 600 °C was investigated. The results showed that the as-deposited alloy was composed of only g phase. After annealing at 600 °C, the locations of diffraction peaks were still the same. The (220) diffraction peak of the deposition side increased with annealing time. The sheet on deposited side had a tendency toward forming (220) texture during post-annealing. No obvious texture was observed at as-deposited and annealed sheet at 600 °C in substrate side. The count and size of "voids" decreased with time. The size of grains increased obviously with annealing time. The ultimate tensile strength of EB-PVD Ni-23.5Cr-2.66Co-1.44Al alloy sheet increased from 641 MPa to 829 MPa after annealing at 600 °C for 30 hours.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License