镍基单晶高温合金DD6动态本构参数标定与Johnson-Cook模型验证

doi:10.11896/cldb.25070253

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Abstract This study presents a systematic calibration and validation of the Johnson-Cook (J-C) constitutive model for the domestic second-generation nickel-based single-crystal superalloy DD6, specifically along the [001] orientation, targeting its application in aero-engine turbine blades. To accurately characterize its dynamic mechanical response, tensile and compressive tests were conducted over a wide temperature range (room temperature to elevated temperatures) and a wide range of strain rates (from quasi-static to high strain rates) utilizing a universal testing machine and a split Hopkinson pressure bar system. Based on the experimental data, a complete set of J-C constitutive parameters for the DD6 alloy in the [001] orientation was determined. Furthermore, failure parameters within the J-C damage model (d₁, d₂, d₃, d₅) were calibrated using quasi-static tensile tests on notched specimens at room temperature. The predictive capability of the calibrated J-C model was validated by combined experimental and finite element analysis of surface residual stresses induced by milling. The results demonstrated that the J-C model accurately predicts the distribution of the machining-induced residual stress, with an average error of only 7.73% between simulation and experimental measurements. The findings confirm that the DD6 alloy in the [001] orientation exhibits significant strain rate strengthening and temperature softening effects, and the established constitutive model demonstrates reliable engineering applicability.

Key words： nickel-based superalloy DD6 Johnson-Cook constitutive model mean stress triaxiality milling process surface residual stress

Received: 10 May 2026 Published: Online: 2026-05-18

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TB31

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	Articles by authors
	SHI Jianjun
	LIU Lin
	LI Tingxin
	CHEN Chen

Cite this article:

SHI Jianjun,LIU Lin,LI Tingxin, et al. Dynamic Constitutive Parameter Calibration and Johnson-Cook ModelValidation for Nickel-based Single-crystal Superalloy DD6[J]. Materials Reports, 2026, 40(9): 25070253-8.

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https://www.mater-rep.com/EN/10.11896/cldb.25070253 OR https://www.mater-rep.com/EN/Y2026/V40/I9/25070253

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