挤压态FGH4096合金室温变形及临界晶粒长大研究

doi:10.11896/cldb.20050136

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Abstract Based on the compression deformation at room temperature and heat treatment of extruded FGH4096 alloy cylinder and double-cone specimens, with the DEFORM numerical simulation, the critical equivalent strain window condition of critical grain growth (CGG) at room tempera-ture compression for extruded FGH4096 alloy was determined, and the mechanism of critical grain growth at room temperature compression for extruded FGH4096 alloy was analyzed. The results show that the critical equivalent strain window condition at room temperature compression at the compression speed of 0.01 mm/s for extruded FGH4096 alloy is 0.03—0.07, and it is 0.005—0.06 at the compression speed of 0.05 mm/s. The critical grain growth of room temperature deformation for extruded FGH4096 alloy is related to the degree of grain deformation and the disappearance of Zener pinning at grain boundary after γ′ phase dissolution, and it is shown as the abnormal grain character of coarse grain consuming fine grain in the small deformation region.

Key words： FGH4096 superalloy extruded room temperature compression heat treatment critical grain growth

Published: 03 August 2021

CLC number:

V256

Fund:Research Foundation of Education Bureau of Hunan Province,China (16A220), Natural Science Foundation of Hunan Province(2017JJ2403), Support Program for Scientific and Technological Innovation Team of the Higher Education Institutions of Hunan Province, China(2014207),Graduate Innovation Foundation of Central South University of Forestry and Technology(CX20192078).

About author:: Songhao Liu is a postgraduate,studying in Central South University of Forestry & Technology. He participates in the development of forming process, structure and properties of advanced superalloy.
Jiayong Si received his Ph.D. degree in material science and engineering from Central Iron and Steel Research Institute in 2009. He is currently an associate professor in Central South University of Forestry & Technology and participates in the development of for-ming process, structure and properties of advanced superalloy. His research interests are the stress and strain, numerical simulation, microstructure and mechanical properties of powder superalloy with the application in advanced aero-engine.

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	LIU Songhao
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	CHEN Long

Cite this article:

LIU Songhao,SI Jiayong,CHEN Long. Study on Room Temperature Deformation and Critical Grain Growth for Extruded FGH4096 Alloy[J]. Materials Reports, 2021, 35(14): 14107-14114.

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http://www.mater-rep.com/EN/10.11896/cldb.20050136 OR http://www.mater-rep.com/EN/Y2021/V35/I14/14107

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