高温高压柔性介质成形GH4169异形超细曲面的致密化行为

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Abstract The ceramic mold was used to control the shape and the GH4169 ultra-fine irregular curved surface was prepared under the high temperature and high pressure flexible medium, the thickness of the curved surface was 0.5 mm. The densification degree of the irregular curved surface was observed and analyzed by SEM. The results show that the densification degree of the curved surface is the densest at both ends, followed by the middle center, and the lowest at the middle edge. At the same time, the Shima-Oyane constitutive equation modified by the uniaxial tension experiment was used to simulate the numerical simulation. The distribution nephogram of density, equivalent Cauchy stress and displacement vector of the neutral surface of the irregular curved surface were obtained. The densification behavior of GH4169 powder in the rigid mold was described from the point of node displacement. The results show that in the process of hot isostatic pressing, the irregular surface shrinks inward along the thickness direction. The displacement of the two ends is the largest, and the density is the highest. The center position in the middle is lower, and the edge in the middle is the lowest. The simulation results are consistent with the experimental results.

Key words： ceramic mold flexible medium hot isostatic pressing (HIP) ultra-fine curved surface numerical simulation density node displacement

Received: 20 January 2020 Published: 11 August 2020

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	MA Ding
	LANG Lihui
	XIAO Yi
	MENG Fandi
	LI Shiyue

Cite this article:

MA Ding,LANG Lihui,XIAO Yi, et al. Densification behavior of GH4169 ultra-fine curved surface irregular structures formed by high temperature and high pressure flexible media[J]. Materials Science and Engineering of Powder Metallurgy, 2020, 25(3): 185-190.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2020/V25/I3/185

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