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2013•Materials Science and Engineering of Powder MetallurgyRequires access

Effects of Fe and Ni on microstructure and high temperature mechanical properties of Al-Cu-Mg-Ag alloy

Zhiyi Liu

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Abstract

Microstructures and mechanical properties of Al-Cu-Mg-Ag and Al-Cu-Mg-Ag-Fe-Ni alloy were investigated at different temperatures by means of high temperature tensile test,XRD,SEM and TEM.The results show that,the additions of Fe and Ni can decrease the age hardening responsibility of the Al-Cu-Mg-Ag alloy and suppresse precipitation and coarsening of Ω phase by consuming Cu atoms soluted within the matrix,thereby leading to the prolonged time to reach to peak value of the Al-Cu-Mg-Ag-Fe-Ni alloy being larger than that of the Al-Cu-Mg-Ag alloy,and decrease of hardness and tensile strength,in peak-aged condition at 190 ℃.Although the strength of Al-Cu-Mg-Ag-Fe-Ni alloy is always lower than that of Al-Cu-Mg-Ag alloy,but it suggests that the combined additions of Fe and Ni can enhance the stability of strength of Al-Cu-Mg-Ag alloy.

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What this paper is about

Microstructures and mechanical properties of Al-Cu-Mg-Ag and Al-Cu-Mg-Ag-Fe-Ni alloy were investigated at different temperatures by means of high temperature tensile test,XRD,SEM and TEM.The results show that,the additions of Fe and Ni can decrease the age hardening responsibility of the Al-Cu-Mg-Ag alloy and suppresse precipitation and coarsening of Ω phase by consuming Cu atoms soluted within the matrix,thereby leading to the prolonged time to reach to peak value of the Al-Cu-Mg-Ag-Fe-Ni alloy being larger than that of the Al-Cu-Mg-Ag alloy,and decrease of hardness and tensile strength,in peak-aged condition at 190 ℃.Although the strength of Al-Cu-Mg-Ag-Fe-Ni alloy is always lower than that of Al-Cu-Mg-Ag alloy,but it suggests that the combined additions of Fe and Ni can enhance the stability of strength of Al-Cu-Mg-Ag alloy.

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Available abstract

Microstructures and mechanical properties of Al-Cu-Mg-Ag and Al-Cu-Mg-Ag-Fe-Ni alloy were investigated at different temperatures by means of high temperature tensile test,XRD,SEM and TEM.The results show that,the additions of Fe and Ni can decrease the age hardening responsibility of the Al-Cu-Mg-Ag alloy and suppresse precipitation and coarsening of Ω phase by consuming Cu atoms soluted within the matrix,thereby leading to the prolonged time to reach to peak value of the Al-Cu-Mg-Ag-Fe-Ni alloy being larger than that of the Al-Cu-Mg-Ag alloy,and decrease of hardness and tensile strength,in peak-aged condition at 190 ℃.Although the strength of Al-Cu-Mg-Ag-Fe-Ni alloy is always lower than that of Al-Cu-Mg-Ag alloy,but it suggests that the combined additions of Fe and Ni can enhance the stability of strength of Al-Cu-Mg-Ag alloy.

Key concepts: Alloy, Materials science, Microstructure, Ultimate tensile strength, Precipitation, Precipitation hardening, Metallurgy, Tensile testing

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Effects of Fe and Ni on microstructure and high temperature mechanical properties of Al-Cu-Mg-Ag alloy — Research Paper | ScholarLens