발간논문

Home > KJMM 논문 > 발간논문

Vol.36, No.4, 502 ~ 509, 1998
Title
The Prediction of Deformation Resistance of Al 6061 during Hot Deformation
조상현 , 김유승 , 유연철 , 임성한 , 오수익 Sang Hyun Cho , Yu Seung Kim , Yeon Chul Yoo , Sung Han Rhim , Soo Ik Oh
Abstract
The hot deformation process of Al 6061 alloy was simulated by hot torsion test. The torsion tests were performed in the ranges of 400-550℃ and 5.0×10^(-2)∼5.0×10^0/sec to predict the deformation resistance. The flow curves showed the characteristic of dynamic recrystallization(DRX) and the dependence of the flow stress on temperature(T) and strain rate (E) was expressed by hyperbolic sine law. (ε) = 2.9x10^(-3) (sinh 0.0295σ)^(6.2) exp(-207080/RT). The ZenerHollomon parameter obtained to predict the flow curves was Z= (ε) exp(207080/RT) and peak stress was expressed as σ_p=4.1ln∼(Z/A)+29.5. The modelling σ-ε curves of Al 6061 alloy were completely agreed with experimental results over the whole strain. since the hardening caused by deformation and the softening caused by dynamic recrystallization were taken into consideration in this modelling equation.
Key Words
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.