Effects of grain shape and texture on the yield strength anisotropy of Al-Li alloy sheet
Journal Article
·
· Scripta Materialia
- Korea Univ., Seoul (Korea, Republic of). Dept. of Metallurgical Engineering
- Korea Inst. of Science and Technology, Seoul (Korea, Republic of). Div. of Metals
The in-plane anisotropy of yield strength in aluminum-lithium (Al-Li) alloys has been attributed to crystallographic textures, grain morphologies, and directional precipitates. Hot-rolled Al-Li alloys are reported to exhibit the minimum yield strength near 45{degree} to the rolling direction due to rolling textures (i.e., Cu, S and Bs components in {beta}-fiber) and elongated grains. During recrystallization treatment in the thermo-mechanical processing, continuous recrystallization (CRX) or discontinuous recrystallization (DRX) can take place. It is known that CRX occurs by formation and growth of subgrains, while the DRX occurs by growth of newly developed nuclei with different crystal orientations from those of original grains. CRX hardly alters texture, on the contrary DRX completely changes the texture. The grain morphology of CRX, affected by rolling and recrystallization conditions, can be controlled without changing crystallographic textures. In this work, equiaxed grains with rolling textures are obtained by CRX, and the contributions of grain shape and texture to the in-plane anisotropy of yield strength have been identified in an Al-Li-Cu-Mg-Zr-Mn alloy.
- OSTI ID:
- 335277
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 6 Vol. 40; ISSN 1359-6462; ISSN SCMAF7
- Country of Publication:
- United States
- Language:
- English
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