激光熔覆Inconel 625合金高温高应变率下的力学行为及本构模型

doi:10.11896/cldb.23120263

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Abstract In order toinvestigate the mechanical behavior of laser cladding Inconel 625 (IN625) alloy at high temperature and high strain rate, laser cladding IN625 alloy samples were prepared, the compressive stress-strain curves of the samples were obtained at four temperatures (25 ℃, 600 ℃, 800 ℃, 1 000 ℃) and three strain rates (1 000 s^-1, 2 000 s^-1, 3 000 s^-1), and an applicable constitutive model was constructed. The results show that the stress-strain curves of laser cladding IN625 alloy exhibited elastic and plastic stages at four temperatures and three strain rates. At various temperatures, the yield strength and flow stress of the material increased with the increase of strain rate, exhibiting a significant strain rate strengthening effect. At various loading strain rates, the flow stress and yield strength of the material decreased with increasing tempe-rature, representing a significant temperature softening effect. Based on stress-strain data and Johnson-Cook (J-C) constitutive model, the model was modified by fitting the temperature softening index and strain rate sensitivity coefficient. The fitted values of the model were in good agreement with the experimental results, accurately describing the mechanical behavior of the material.

Key words： laser cladding IN625 alloy high temperature and high strain rate mechanical property constitutive model

Published: 25 February 2025 Online: 2025-02-18

CLC number:

O347.3

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	Articles by authors
	LEI Jingfa
	ZHAO Chenxia
	LIU Tao
	SHEN Zhaoyang
	LI Siyue

Cite this article:

LEI Jingfa,ZHAO Chenxia,LIU Tao, et al. Mechanical Properties and Constitutive Model of Laser Cladding Inconel 625 Alloy at High Temperatures and High Strain Rates[J]. Materials Reports, 2025, 39(4): 23120263-7.

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https://www.mater-rep.com/EN/10.11896/cldb.23120263 OR https://www.mater-rep.com/EN/Y2025/V39/I4/23120263

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