발간논문

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Vol.40, No.8, 839 ~ 846, 2002
Title
Research Papers / Mechanical Behaviors : Effects of Forming Conditions and Initial Microstructures on the Equal Channel Angular Pressing of Ti-6Al-4V Alloy
고영건Young Gun Ko,정원식Won Sik Jeong,신동혁Dong Hyuk Shin,이종수Chong Soo Lee
Abstract
The effects of pressing temperatures and initial microstructures on the formability during equal channel angular pressing (ECAP) of Ti-6Al-4V alloy were investigated in this study. ECAP above 600℃ was successful without producing any noticeable segments at the specimen surfaces after a single pass of pressing. Also, the equiaxed microstructure showed more uniform material flow at the surface than the Widmanstatten microstructure. However, this microstructural influence was diminished with the increase of the number of ECA pressing. A flow localization parameter that quantifies the flow non-uniformity was used to explain the microstructural effect.
Key Words
Equal channel angular pressing , Ti-6Al-4V alloy , Flow - localization parameter , Flow softening
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