Transactions of Materials and Heat Treatment

Title：Influence of hot-forge processing parameter on FGH4096 alloy grain size

Authors： LI Hui1 YAO Ze-kun1 YUE Tai-wen1 TAO Yu2 NING Yong-quan1 GUO Hong-zhen1 (1.Department of Materials Science and Engineering Northwestern Polytechnical University Xi'an 710072 China 2.Central Iron and Steel Research Institute Beijing 100086 China)

Unit：

KeyWords： P/M FGH4096 superalloy grain size refinement

ClassificationCode：TG316

year,vol(issue):pagenumber：2009,34(2):13-17

Abstract：

The changing laws of grain size of as-annealed FGH4096 superalloy deform at different strain rates,temperatures and deformation conditions were investigated by the heat die(die temperature: 900℃) forging method.The results show that the average grain diameter is reduced with increasing deformation,is increased with elevating temperature,and is decreased with increasing the initial strain rate.The size of the initial strain rate is not significantly affected when 40% deformation has been reached.In low strain rate deformation,the deformation grain transfers continuously.Crystallization is gradually completed and the first crystallization grains can be brought up again.Refining effect declines.In high strain rate deformation,the grain is almost simultaneously deformation,recrystallizating simultaneously occurs and thus the refining effect is significant.

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Reference：

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