Aging Hardening and Precipitation Characteristics of Extruded Mg–9Al–0.8Zn–0.2Mn–0.3Ca–0.2Y Alloy

Fangce Liu; Yue Bi; Chao Wang; Jian Kang; Tong He; Yandong Liu; Guo Yuan

doi:10.1007/s12540-022-01254-0

추천

검색

자료유형: 학술저널

저자정보: Fangce Liu (Northeastern University) Yue Bi (Northeastern University) Chao Wang (Northeastern University) Jian Kang (Northeastern University) Tong He (Northeastern University) Yandong Liu (Northeastern University) Guo Yuan (Northeastern University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.29 No.3

발행연도: 2023.3

수록면: 715 - 729 (15page)

DOI: 10.1007/s12540-022-01254-0

이용수

📌

연구주제

📖

연구배경

🔬

연구방법

🏆

연구결과

초록· 키워드

오류제보하기

In this paper, high temperature hot rolling and weld simulations were performed in Al-killed and Ti-Zr-killed steels. Themicrostructure and impact toughness of the heat-affected zone (HAZ) of the two experimental steels were investigated, andthe ferrite transformation behavior in HAZ was also observed. The characteristic inclusions in the Ti-Zr-killed steel werestudied using electron probe microanalysis (EPMA) and electron backscatter diffraction (EBSD). The results suggested thatthe HAZ microstructure of the Al-killed steel consisted of coarse bainite ferrite (BF) and granular bainite (GB) packets. TheHAZ microstructure of Ti-Zr-killed steel was significantly refined and mainly contained fine acicular ferrite (AF) and BF. TheTi-Zr-O + MnS inclusions were 0.3–2.1 μm and could effectively promote the formation of AF after the weld simulations.MnS had a specific orientation relationship: {111}MnS║{0001}Ti-Zr-O, < 110 > MnS║ < 2 −1−1 0 > Ti-Zr-O with Ti-Zr-O inclusion,and its precipitation promoted the formation of the Mn-depleted zone (MDZ). AF formed around it. The formation of aninterlocked AF structure in the HAZ of the Ti-Zr-killed steel obviously increased the proportion of high angle grain boundaries(HAGBs) and refined the average effective grain size of the HAZ microstructure. Consequently, the impact toughnessof the Ti-Zr-killed steel had no deterioration, but the impact toughness of Al-killed steel had an obvious loss after the weldsimulation with a heat input of 70 kJ/cm. The impact absorption energy of HAZ of Ti-Zr-killed steel was improved from 6to 219 J compared to Al-killed steel.

#Low-carbon steel · Heat-affected zone · Impact toughness · Acicular ferrite · Inclusion

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!