Microstructure of spray-formed FGH4095 after static recrystallization

Zhang Yu; Ge Chang-Chun; Shen Wei-Ping; Qiu Cheng-Jie

doi:10.7498/aps.61.208101

Abstract

For the study of solution heat treatment characteristic of spray-formed FGH4095 after near iso thermal forging, the superalloy specimens, which have been hot isostatically pressed (HIPed) and forged with a 75% compression ratio, are solution heat treated at 1120℃, 1140℃ and 1160℃ for 10, 20 and 40 min respectively, and oil quenched. The characteristics of static recrystallization process including grain size and precipitated phase after heat treatment are discussed. The results show that the temperature of solution heattreatment has a great influence on the microstructure. In heat treatment at 1120℃ the recrystallization is slow, and the necklace structure is formed due to the localized incomplete recrystallization; at 1140℃ for 40 min, the static recrystallization is basically completed, the average grain size is about 8 μm; at 1160℃, the recrystallization is finished in 10 min, and the grains grow up to about 18 μm.

Keywords:

Authors and contacts

1.
Institute of Special Ceramics and Powder Metallurgy, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Funds: Project supported by the National Natural Science Foundation of China (Grant No. 50974016).

References

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Cited By

[1]	Guo W, Wu J, Zhang F, Zhao M 2006 J. Iron Steel Res. Int. 13 65
[2]	Jia J, Tao Y, Zhang Y W, Zhang Y 2010 Powd. Metall. Ind. 20 25 (in Chinese) [贾建, 陶宇, 张义文, 张莹 2010 粉末冶金工业 20 25]
[3]	Grant P S 1995 Prog. Mater. Sci. 39 497
[4]	Li Z, Tian S F, Zhao X G, Liang Z K, Ren L P, Mi G F, Yan M G 1996 Acta Metall. Sin. (Engl. Lett.) 9 523
[5]	Zhang G Q, Li Z, Tian S F, Yan M G 2006 J. Aero. Mater. 26 258 (in Chinese) [张国庆, 李周, 田世藩, 颜鸣皋 2006 航空材料学报 26 258]
[6]	Zhang Y, Xu Y, Ge C C, Shen W P, Guo B, Guo Z J 2011 J. Iron Steel Res. 23 466 (in Chinese) [张宇, 徐轶, 葛昌纯, 沈卫平, 郭彪, 郭志家 2011 钢铁研究学报 23 466]
[7]	Ning Y Q, Yao Z K, Yue T W, Guo H Z, Tao Y, Zhang Y W 2009 Rare Metal Mat. Eng. 38 1783 (in Chinese) [宁永权, 姚泽坤, 岳太文, 郭鸿镇, 陶宇, 张义文 2009 稀有金属材料与工程 38 1783]
[8]	Gao Q, Zhang S H, Hu B F, Li H Y 1996 Acta Metall. Sin. 32 1019 (in Chinese) [高庆, 章守华, 胡本芙, 李惠英 1996 金属学报 32 1019]

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Vol. 61, Issue 20 - 2012-10-20

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