Impact of Texture and Microstructure on In-plane Anisotropy of Ultra-high Strength Aluminium Alloy

In order to master the impact of texture and microstructure on the in-plane anisotropy of tensile mechanical properties of ultra-high strength Al-Zn-Mg-Cu alloy,the extruded plate and its isothermal forged piece were manufactured. The microstructure, tensile mechanical properties and the intensity o...

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Bibliographic Details
Published in:Hang kong cai liao xue bao 2015-06, Vol.35 (3), p.1-6
Main Authors: Ma, Zhi-Feng, Zhao, Wei-Yi, Lu, Zheng
Format: Article
Language:Chinese
Subjects:
Aluminum base alloys
Anisotropy
Deformation
Mathematical models
Microstructure
Strength
Surface layer
Texture
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Summary:In order to master the impact of texture and microstructure on the in-plane anisotropy of tensile mechanical properties of ultra-high strength Al-Zn-Mg-Cu alloy,the extruded plate and its isothermal forged piece were manufactured. The microstructure, tensile mechanical properties and the intensity of texture were tested and the Schmidt factors were calculated. The relationship of the texture, microstructure and the tensile strength anisotropy were observed by means of single crystal model with Schmidt factor and Hall-Petch law. The results show that the alloy is dominated by deformation texture after intense deformation, and deformation textures leads lower strength of 45 and causes anisotropies. Fibrous tissue formed by extrusion is the main reason of the anisotropy in L and LT directions. The increased strength caused by {110} Brass texture can counterbalance the anisotropy in L and LT directions caused by fibrous tissue. The chainlike distribution of the second phase particles in grain boundary is the key
ISSN:1005-5053
DOI:10.11868/j.issn.1005-5053.2015.3.001