Effects of Cryogenic Deformation on Second-Phase Al2Cu Particles and Mechanical Properties of 2219 Al–Cu Alloy Rings

Jianwu Huang; Youping Yi; Shiquan Huang; Fei Dong; Wanfu Guo; Dengliang Tong; Hailin He

추천

검색

자료유형: 학술저널

저자정보: Jianwu Huang (Central South University) Youping Yi (Central South University) Shiquan Huang (Central South University) Fei Dong (Central South University) Wanfu Guo (Central South University) Dengliang Tong (Central South University) Hailin He (Central South University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.5

발행연도: 2021.1

수록면: 815 - 824 (10page)

이용수

📌

연구주제

📖

연구배경

🔬

연구방법

🏆

연구결과

초록· 키워드

오류제보하기

2219 Al–Cu alloy transition rings are widely used in launch vehicles. However, the coarse and agglomerated second-phaseAl2Cuparticles significantly deteriorate the mechanical properties and ductility of 2219 Al–Cu alloy rings manufactured bytraditional thermal deformation processes. In this study, cryogenic deformation (− 190 °C) is applied for the manufacturingof 2219 Al–Cu alloy rings to alleviate this problem. The effects on the evolution of second-phase Al2Cuparticles and themechanical properties of the T8-aged samples were examined in comparison with the results of room-temperature (25 °C)and conventional thermal deformation at 480 °C. The results indicate that cryogenic deformation can effectively producehigh-density dislocations and strongly crush coarse particles, promoting the dissolution of Al2Cuparticles and improving theirdistribution in the Al matrix when combined with subsequent solution treatment and rolling processes. As the deformationtemperature was decreased from 480 to −190 °C, the area fraction of the coarse particles was decreased from 1.55 to 0.47%,while their mean size was decreased from 11.8 to 8.3 μm. Correspondingly, the uniformity and density of the precipitatesafter T8 aging were improved. Thus, the mechanical properties of the T8-aged samples were improved with decreasingdeformation temperatures; the average ultimate tensile strength, yield strength, and elongation were increased by 20 MPa,22 MPa, and 3.1% at room temperature.

#Al–Cu alloy · Rings · Cryogenic deformation · Second-phase particles · Dislocations · Mechanical properties

참고문헌 (0)

참고문헌 신청

참고문헌이 DBpia에서 서비스 중이라면, [참고문헌 신청]을 통해 등록해보세요

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!