Effects of Deformation Rate on Recrystallization and Properties of 7150 Aluminum Alloy

Chen Kanghua; Chen Songyi; Peng Guosheng; Fang Huachan; Xiao Daihong

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Effects of Deformation Rate on Recrystallization and Properties of 7150 Aluminum Alloy
Vol. 30, Issue 2, Pages: 103-107(2010)
Published： 2010 ，
DOI：

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[1]陈康华,陈送义,彭国胜,方华婵,肖代红.变形程度对7150铝合金再结晶及性能的影响[J].特种铸造及有色合金,2010,30(02):103-107+91.

Chen Kanghua, Chen Songyi, Peng Guosheng, et al. Effects of Deformation Rate on Recrystallization and Properties of 7150 Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 30(2):103-107(2010)
[1]陈康华,陈送义,彭国胜,方华婵,肖代红.变形程度对7150铝合金再结晶及性能的影响[J].特种铸造及有色合金,2010,30(02):103-107+91. DOI：

Chen Kanghua, Chen Songyi, Peng Guosheng, et al. Effects of Deformation Rate on Recrystallization and Properties of 7150 Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 30(2):103-107(2010) DOI：

摘要

采用拉伸性能测试、晶间腐蚀、剥落腐蚀及电化学测试

结合金相和扫描电镜等分析手段

研究了变形程度对7150铝合金再结晶及性能的影响。结果表明

变形量越大

合金的再结晶程度越高。当变形量为75%时

合金的强度最高

变形量为60%时

晶间腐蚀和剥落腐蚀敏感性最低;再结晶程度随变形量增大是导致合金抗晶间腐蚀性能降低的主要原因。当合金变形程度为75%时

综合性能最佳。

Abstract

Effects of deformation rate on recrystallization and properties of 7150 aluminum alloy were investigated by tensile testing

intergranular corrosion

exfoliation corrosion

electrochemical testing and optical microscope（OM） and SEM （scanning electron microscope）. The results indicate that the volume of recrystallization is increased with increasing in deformation rate. The highest mechanical properties can be observed with 75% deformation rate

and the lowest intergranular corrosion and exfoliation corrosion sensitivity are measured with 60% deformation rate

which is verified by electrochemical testing. The volume of recrystallization which increases with deformation rate increases is mainly responsible for weakening the resistance of local corrosion. Taking mechanical and local corrosion properties into account

the optimized deformation rate is 75%.