Effect of Thermo-Mechanical Age Hardening on Strength, Hardness and Elongation in an Al-Cu-Mg Alloy

سال انتشار: 1395
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 410

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شناسه ملی سند علمی:

IIAC04_058

تاریخ نمایه سازی: 22 دی 1396

چکیده مقاله:

Thermo-Mechanical Processing (TMP) is defined as a combination of metal forming, heat treating and phase transformations. Thermo-Mechanical Age Hardening (TMAH) can produce new dislocation structure, small precipitates and dislocation-precipitate locks which lead to higher tensile strength, hardness and elongation simultaneously. This goal is not achievable in common strengthening operations whereas elongation normally decreases by increasing hardness and tensile strength. In this research, effect of TMAH on mechanical properties in an Al-Cu-Mg alloy is investigated. Specimens were first annealed and homogenized. Finding the optimum aging time, the specimens were 45 percent rolled in 100˚C and age hardened. Afterwards, the mechanical properties were evaluated in terms of hardness and tensile strength. The results indicate that by employing TMAH, the hardness value increases by 42 % and 39 % in accordance with the as-received and T6 specimens respectively. In addition, an increase in tensile strength and yield strength is observed in comparison to T6 specimens; 32 % and 51 %, respectively. Moreover, the average elongation for TMAHed specimen shows 2.5% increase according to T6 ones.

نویسندگان

S Farmani

School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran.

Bakhshivash

School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran.

B MohammadSadeghi

School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran.