| Effect of cold-rolling on tensile strength of SiCw/Al composite |
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| 作者姓名： | ZHANG Wenlong ZHANG Mu GU Mingyuan WANG Dezun and YAO Zhongkai
State Key Lab of MMCs Shanghai Jiaotong University Shanghai China
School of Materials Science and Engineering Harbin Institute of Technology Harbin China |
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| 作者单位： | ZHANG Wenlong，ZHANG Mu，GU Mingyuan，WANG Dezun，and YAO Zhongkai
1) State Key Lab of MMCs，Shanghai Jiaotong University，Shanghai 200030，China
2) School of Materials Science and Engineering，Harbin Institute of Technology，Harbin 150001，China |
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| 基金项目： | This work is financially supported by the National Natural Science Foundation if China(No.50071031) |
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| 摘 要： | SiCw/Al composite was fabricated through a squeeze cast route and cold rolled to about 30%, 50% and 70% re-duction in thickness, respectively. The length of whiskers in the composite before and after rolling was examined using SEM. Some of the rolled composites were recrystallization annealed to remove the work hardening of matrix alloy. The tensile strength of the rolled and annealed SiCw/Al composites was examined and then associated with the change of the whisker length and the work hardening of matrix alloy. It was found that the tensile strength is a function of the degree of cold rolling. For the cold rolled composites, with the increase in the degree of cold rolling, the tensile strength increases at first, and decreases when the degree of cold rolling exceeds 50%. For the annealed ones, however, the tensile strength de-creases monotonously with the increase in rolling degree. The different changes in tensile strength between the rolled and annealed composites could be attributed to the result of
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Effect of cold-rolling on tensile strength of SiCw/Al composite |
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| ZHANG Wenlong,ZHANG Mu,GU Mingyuan,WANG Dezun,and YAO Zhongkai
State Key Lab of MMCs,Shanghai Jiaotong University,Shanghai ,China
School of Materials Science and Engineering,Harbin Institute of Technology,Harbin ,China.Effect of cold-rolling on tensile strength of SiCw/Al composite[J].Rare Metals,2003,22(4). |
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| Authors: | Zhang Wenlong ZHANG Mu GU Mingyuan Wang Dezun Yao Zhongkai |
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| Abstract: | SiCw/Al composite was fabricated through a squeeze cast route and cold rolled to about 30%, 50% and 70% re-duction in thickness, respectively. The length of whiskers in the composite before and after rolling was examined using SEM. Some of the rolled composites were recrystallization annealed to remove the work hardening of matrix alloy. The tensile strength of the rolled and annealed SiCw/Al composites was examined and then associated with the change of the whisker length and the work hardening of matrix alloy. It was found that the tensile strength is a function of the degree of cold rolling. For the cold rolled composites, with the increase in the degree of cold rolling, the tensile strength increases at first, and decreases when the degree of cold rolling exceeds 50%. For the annealed ones, however, the tensile strength de-creases monotonously with the increase in rolling degree. The different changes in tensile strength between the rolled and annealed composites could be attributed to the result of the competition between the work hardening of matrix resulting from the cold rolling and the work softening arising from the change of whisker length. |
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| Keywords: | metal matrix composites tensile strength cold rolling microstructure |
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