Investigation of Quench Sensitivity and Microstructure Evolution During Isothermal Treatment in 2195 Al?Li Alloy

Zhiwu Zhang; Youping Yi; Wen You; Shiquan Huang; Yonglin Guo; Hailin He

doi:10.1007/s12540-021-01000-y

추천

검색

자료유형: 학술저널

저자정보: Zhiwu Zhang (Central South University) Youping Yi (Central South University) Wen You (Southwest Aluminum Group Co. Ltd) Shiquan Huang (Central South University) Yonglin Guo (Southwest Aluminum Group Co. Ltd) Hailin He (Central South University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.6

발행연도: 2022.6

수록면: 1,423 - 1,432 (10page)

DOI: 10.1007/s12540-021-01000-y

이용수

📌

연구주제

📖

연구배경

🔬

연구방법

🏆

연구결과

초록· 키워드

오류제보하기

To investigate the quenching sensitivity of the 2195 Al?Li alloy rolled sheet and guide the design of the quenching process,the time?temperature-property (TTP) curves of this material were researched through interrupted quenching experiments. The differential scanning calorimetry (DSC) and transmission electron microscope (TEM) were used to characterize theevolution of precipitates during isothermal treatment. The results of this essay demonstrated that the nose temperature of 2195Al?Li alloy is around 370 °C and the temperature range of quenching sensitivity is 340 °C to 400 °C. The microstructureobservation revealed that the T1particles precipitate and grow rapidly at the temperature from 340 to 400 °C, which is dueto the high nucleation rate of phase and fast solute diffusion kinetics, especially at the nose temperature. The needle-shapedθ′/θ″ and T1particles grow up quickly as the isothermal preservation time prolonged, leading to the decrease of the supersaturatedsolid solution of the matrix. This will reduce the number of the age-induced precipitate and weaken the subsequentage hardening effect. Therefore, the rate of cooling should be increased in the quenching sensitivity range (340?400 °C) toinhibit the precipitation of the second phase and obtain excellent mechanical properties. While in other temperature ranges,the cooling rate should be decreased appropriately to reduce residual stress. The appropriate average cooling rate is recommendedto be around 13 °C s?1 at the temperature from 340 to 400 °C.

#2195 Al?Li alloy · Quenching sensitivity · Phase formation · TTP curve · Microstructure

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!