In-situ EBSD study on the microstructure evolution of an Al–Mg–Si–Fe alloy with different precipitation free zones during tension at cryogenic and ambient temperatures

材料科学 电子背散射衍射 微观结构 极限抗拉强度 猝灭(荧光) 冶金 合金 加工硬化 复合材料 延展性(地球科学) 蠕动 物理 量子力学 荧光
作者
Xinyu Huan,Chenglu Liu,Kesong Miao,Hao Wu,Rengeng Li,Xuewen Li,Guohua Fan
出处
期刊:Materials Science and Engineering A-structural Materials Properties Microstructure and Processing [Elsevier BV]
卷期号:873: 145029-145029 被引量:2
标识
DOI:10.1016/j.msea.2023.145029
摘要

AA6101 (Al-0.44Mg-0.39Si-0.12Fe) extrudate was subjected to solid solution treatment followed by either water quenching (WQ) or air quenching (AQ) before a peak artificial aging (T6) to produce different precipitation free zone widths. These samples are then tested using uniaxial tension at 298 K and 77 K to study the effect of the initial microstructure and cryogenic temperature on the mechanical properties. The yield strength, ultimate tensile strength and ductility of the sample at 77 K are higher than those at 298 K. The yield strength of the air quenching sample is lower than that of the water quenching sample at the same temperature. The microstructure evolution was further characterized by in-situ tensile tests performed at both room and cryogenic temperatures. Based on the in-situ SEM/EBSD results with increasing strain, the deformation mechanisms at both room and cryogenic temperatures are revealed in terms of the accumulation of geometrically necessary dislocations (GNDs), activation of slip systems and lattice rotations. In-situ EBSD results show that with increasing strain, the GND distribution becomes more uniform at 77 K, resulting in a higher work hardening rate than that at 298 K. Wider precipitate free zone (PFZ) in air quenching sample leads to higher stress mismatch resulting in intergranular fracture. The dislocation pile-up at the edge of PFZ leads to strain relaxation at grain boundaries and increased ductility. The dislocations at the edge of PFZ and in grains are uniformly distributed resulting delayed crack initiation and further ductility improvement at 77 K.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
wbh发布了新的文献求助10
1秒前
2秒前
3秒前
4秒前
佳里发布了新的文献求助10
6秒前
酸奶花生完成签到 ,获得积分10
6秒前
CT发布了新的文献求助10
7秒前
NexusExplorer应助11111采纳,获得10
8秒前
123完成签到,获得积分10
8秒前
12秒前
酷波er应助冷艳的姿采纳,获得10
13秒前
13秒前
小蘑菇应助缥缈冷安采纳,获得10
13秒前
ccygpp199发布了新的文献求助10
13秒前
NexusExplorer应助佳里采纳,获得10
14秒前
淡淡的向雁完成签到,获得积分10
14秒前
15秒前
15秒前
Jasper应助LJJ采纳,获得10
17秒前
小啦啦3082发布了新的文献求助10
17秒前
17秒前
18秒前
甜甜的悲完成签到,获得积分20
18秒前
今后应助wbh采纳,获得10
18秒前
19秒前
妖妖灵完成签到,获得积分20
19秒前
加油干发布了新的文献求助10
19秒前
彭于晏应助xuan采纳,获得10
19秒前
甜甜的悲发布了新的文献求助10
20秒前
gwenjing发布了新的文献求助10
21秒前
wsj发布了新的文献求助10
23秒前
23秒前
量子星尘发布了新的文献求助10
23秒前
张金蝶发布了新的文献求助10
23秒前
jinzhen发布了新的文献求助10
23秒前
文献发布了新的文献求助30
24秒前
太牛的GGB完成签到,获得积分20
24秒前
25秒前
穿裤子的云完成签到,获得积分10
26秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989334
求助须知:如何正确求助?哪些是违规求助? 3531428
关于积分的说明 11253936
捐赠科研通 3270119
什么是DOI,文献DOI怎么找? 1804887
邀请新用户注册赠送积分活动 882087
科研通“疑难数据库(出版商)”最低求助积分说明 809173