Effect of Temperature and Strain Rate on Tensile Deformation Behavior of GH4151 Ni-based High-temperature Alloy

doi:10.11901/1005.3093.2025.255

Chinese Journal of Materials Research

2026, Vol. 40

Issue (3): 179-187 DOI: 10.11901/1005.3093.2025.255

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Effect of Temperature and Strain Rate on Tensile Deformation Behavior of GH4151 Ni-based High-temperature Alloy

Li Pu¹, HAO Xiaojie²^,³, YE Yi¹, ZHANG Rui²(

), WANG Ying¹, WANG Kai¹, DING Bin¹, CUI Chuanyong²(

), ZHAO Chunling¹

^1.AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China
^2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^3.School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

Cite this article:

Li Pu, HAO Xiaojie, YE Yi, ZHANG Rui, WANG Ying, WANG Kai, DING Bin, CUI Chuanyong, ZHAO Chunling. Effect of Temperature and Strain Rate on Tensile Deformation Behavior of GH4151 Ni-based High-temperature Alloy. Chinese Journal of Materials Research, 2026, 40(3): 179-187.

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Abstract

The effect of temperature and strain rate on the tensile deformation behavior of GH4151 nickel-based superalloy was investigated via tensile test at temperatures ranging from 400 ^oC to 650 ^oC and strain rates from 0.005 min^-1 to 0.02 min^-1. Then the variation of microstructure and fracture surface was examined to elucidate the deformation mechanisms and fracture features. The results show that the alloy exhibits the Portevin-Le Chatelier (PLC) effect at 400 ^oC, which disappears above 500 ^oC due to accelerated solute atom diffusion. Between 600 and 650 ^oC, the combined effect of γ′ phase hardening and matrix softening results in the tensile strength reaching a peak at 600 ^oC, followed by a decrease at 650 ^oC. At higher temperatures (≥ 600 ^oC), the fracture surface displays “dagger-shaped” shear features, and the increased density of geometrically necessary dislocations (GNDs) at grain boundaries promotes intergranular cracking. Higher strain rates (0.02 min^-1) enhance work hardening and local strain concentration, while lower strain rates (0.005 min^-1) facilitate more uniform plastic deformation. This research provides a good reference for optimizing the microstructure control and engineering applications of GH4151 alloy.

Key words: metallic materials nickel-base superalloy tensile properties deformation behavior temperature strain rate

Received: 18 August 2025

ZTFLH:

TG113

Corresponding Authors: ZHANG Rui, Tel: (024)23971758, E-mail: rzhang@imr.ac.cn;
CUI Chuanyong, Tel: (024)83978292, E-mail: chycui@imr.ac.cn

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	Articles by authors
	Li Pu
	HAO Xiaojie
	YE Yi
	ZHANG Rui
	WANG Ying
	WANG Kai
	DING Bin
	CUI Chuanyong
	ZHAO Chunling

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https://www.cjmr.org/EN/10.11901/1005.3093.2025.255 OR https://www.cjmr.org/EN/Y2026/V40/I3/179

Fig.1 Size of tensile samples

Fig.2 Initial microstructure of the studied alloy (a) OM map, (b) grain size distribution chart, (c) intragranular γ′ phase morphology, (d) grain boundary morphology

Fig.3 Engineering stress-strain curves of the studied alloy at various conditions (a) 400 ^oC, (b) 500 ^oC, (c) 600 ^oC, (d) 650 ^oC

Fig.4 Macroscopic fracture morphologies of studied alloy at different conditions

Fig.5 Microscopic fracture morphologies of the studied alloy at 400 ^oC and different strain rates (a-d) 0.005 min^-1, (e-h) 0.02 min^-1

Fig.6 Microscopic fracture morphologies of the studied alloy at 650 ^oC and different strain rates (a-d) 0.005 min^-1, (e-h) 0.02 min^-1

Fig.7 EBSD data analysis of the deformed microstructure after tensile testing at a rate of 0.02 min^-1 (a-c) 600 ^oC, (d-f) 650 ^oC, (a, d) IPF map, (b, e) KAM map, (c, f) GND map

Fig.8 Tensile strength of the alloy varies with temperature (a) 0.005 min^-1, (b) 0.01 min^-1, (c) 0.02 min^-1

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