Hot deformation behavior and microstructure evolution of GH3536-TiB2 composites fabricated by powder metallurgy

ZHOU ShiPeng ¹WANG Shuai ¹HUANG LuJun ²ZHANG Rui ³CHEN Xin ¹MENG FanChao ¹CHEN Run ¹SUN FengBo ¹WANG CunYu ¹GENG Lin²

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作者信息

1. School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China
2. School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China
3. School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;Waikato Centre for Advanced Materials and Manufacturing,School of Engineering,University of Waikato,Hamilton 3240,New Zealand
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Abstract

The hot deformation behavior and microstructure evolution of GH3536-TiB2 composites fabricated by powder metallurgy(PM)were examined in the temperature range of 950-1150℃ and strain rate range of 0.001-1 s-1.The hot compression stress-strain curves and the constitutive equation were obtained.In addition,the hot processing map was drawn,which indicated that the appropriate hot working window was 950-1050℃/0.001-0.1 s-1 and 1050-1100℃/0.001-0.01 s-1.The microstructure analysis showed that the splitting and spheroidization of M3B2 led to a decrease in size and volume fraction at 950-1100℃.At 1150℃,the eutectic microstructure of M3B2+γ was formed due to the dissolution of M3B2,which caused macroscopic cracking of the deformed sample.Additionally,the deformation temperature and the strain rate had little effect on the size and volume fraction of M3B2.Besides,discontinuous dynamic recrystallization(DDRX)and continuous dynamic recrystallization(CDRX)were found in the deformed microstructure,while the former was dominant.Within the test range of this work,the dynamic recrystallization(DRX)fraction of the deformed composites was high due to the bulging nucleation of numerous interfaces.The DRX grain size increased with increasing deformation temperature or decreasing strain rate.Texture analysis showed that the deformation texture of<101>//compression direction RD existed in the matrix when the deformation temperature was below 1100℃,and the texture type became<001>//RD at 1100℃.Additionally,it was also found that the<001>//RD texture was formed in M3B2 under the strain rates of 0.1 and 0.01 s-1.

Key words

GH3536 alloy matrix composites/powder metallurgy/hot deformation behavior/microstructure evolution

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基金项目

National Key R&D Program of China(2021YFB3701203)

National Natural Science Foundation of China(Grant Nos.U22A20113)

National Natural Science Foundation of China(52171137)

National Natural Science Foundation of China(52201156)

National Natural Science Foundation of China(52071116)

Heilongjiang Touyan Team Program,Heilongjiang Provincial Natural Science Foundation of China(TD2020E001)

Heilongjiang Postdoctoral Fund(LBH-Z20058)

Key Laboratories Foundation(6142910220206)

出版年

2024

中国科学:技术科学(英文版)

中国科学院

中国科学:技术科学(英文版)

CSTPCDEI

影响因子：1.056

ISSN：1674-7321

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