期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 889, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.161630
关键词
Aluminum alloy; X-ray analysis; Thermal processing; Electron backscatter diffraction; Microstructure; Texture
资金
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [2020R1C1C1005726]
- Korea Institute of Industrial Technology [KITECH EO-20-0015]
- National Research Foundation of Korea [2020R1C1C1005726] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study investigated the effects of strain rate on the texture evolution of Al-6Mg alloys during one hour of annealing at 300 degrees C. Grain growth was significant in the 0.1 s(-1) cold-sheared sample, while a texture transition from brass type to copper type was observed in the 1 s(-1) sample. The misorientation indices of all samples decreased with annealing time, indicating a stronger texture anisotropy.
This study examined the effects of the strain rate on the texture evolution of Al-6Mg alloys over one hour of annealing at 300 degrees C. Three different strain rates of 0.1 s(-1) , 1 s(-1) , and 10 s(-1) were applied to the samples using a torsion tester. Considerable grain growth was observed in the 0.1 s(-1) cold-sheared sample during one hour of annealing. The growth of B/B and C-oriented grains can explain the grain coarsening behavior. The conventional grain growth, nucleation, and subsequent grain growth, plausibly describe the grain size evolution of those 1 s(-1) and 10 s(-1) cold-sheared samples during annealing. A textural transition from brass type to copper-type was evident during the annealing process of the 1 s(-1) cold-sheared sample. On the other hand, the brass-type texture bias in the 10 s(-1) cold-sheared sample increased gradually over one hour of annealing. The copper-type texture generally evolved under the 0.1 s(-1) cold-sheared condition. Generally, the misorientation indices (= M-index) of all three cold-sheared samples were decreased by extending the annealing time. A smaller M-index indicates stronger texture anisotropy. Although the M-index was higher in the 0.1 s(-1) and 10 s(-1) cold-sheared samples than the 1 s(-1) sample throughout the annealing process, the M-index of the 0.1 s(-1) sample eventually became the lowest among the three conditions under the fully annealed condition. (C) 2021 Elsevier B.V. All rights reserved.
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