固溶处理对GH3625合金板材组织及性能的影响

doi:10.11896/j.issn.1005-023X.2018.02.017

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Abstract

The influence of solution treatment on microstructure and mechanical properties of GH3625 alloy sheet were investigated by OM, SEM, EDS, universal testing machine and Rockwell hardness tester and other means. The results indicated that the grains were equiaxed and there were a large number of annealing twins after the solution treatment. As solution treatment temperature was more than 1 130 ℃, the carbides in alloy almost completely dissolve into the matrix. Grain size was prompted by temperature increasing in the range of 890 ℃ to 1 190 ℃, and the energy (Q_g) of grain growth was 227.18 kJ/mol. At different solution temperature, the grain size and room-temperature mechanical properties of GH3625 alloy accord with Hall-Petch relation. The main strengthening mechanism was fine grained strengthening. With the increase of temperature, the fracture mode of GH3625 alloy sheet was changed from brittle fracture to ductile fracture.

Key words： GH3625 superalloy sheet solution treatment twins grain size fracture

Published: 25 January 2018 Online: 2018-01-25

CLC number:

TG146.1 ⁺5

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	Articles by authors
	Yutian DING
	Bin MENG
	Yubi GAO
	Xin GAO
	Zhengyi DOU
	Yuanjun MA

Cite this article:

Yutian DING,Bin MENG,Yubi GAO, et al. Effect of Solution Treatment on the Microstructure and Mechanical Properties of GH3625 Superalloy Sheet[J]. Materials Reports, 2018, 32(2): 243-248.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.02.017 OR https://www.mater-rep.com/EN/Y2018/V32/I2/243

Chemical composition (mass fraction/%) of experimental material

Original microstructure of GH3625 alloy

Microstructure of GH3625 alloy treated at different temperatures

Distribution of precipitated phase of GH3625 alloy at different solution temperatures

Effect of solution treatment temperature on grain size

Relationship between grain size and solution treatment temperature for GH3625 alloy

Effect of solution treatment temperature on mechanical property

Hall-Petch relation of GH3625 alloy after solution treatment at different temperature

Original fracture morphology of GH3625 alloy sheet

Fracture morphology of GH3625 alloy after solution treatment at different temperature

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