Significant Increase in Strength and Elongation of Al-۳.۷ Cu-۱Mg Alloy Via Short Age Treatment Cycle

سال انتشار: 1399
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 132

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شناسه ملی سند علمی:

JR_IJMSEI-17-3_004

تاریخ نمایه سازی: 1 اسفند 1401

چکیده مقاله:

In this paper, the effect of two-step precipitation hardening on the mechanical properties of Al-۳.۷Cu-۱Mg was investigated. For this meaning, some specimens were subjected to the first step aging at ۱۷۵, ۱۹۰ and ۲۰۵°C for ۲ h, once the samples solution treated at ۵۰۰°C. To have stable precipitates uniformly distributed in the microstructure and to reduce the heat treatment time, the second step was implied at ۶۵°C. The tensile and hardness tests were performed at ambient temperature immediately after aging. The results indicated that depending on the first step temperature, the second aging time affects the alloy mechanical behavior in different aspects. A factor named SNMP introduced to determine the cycle giving the best mechanical properties. The strength and elongation increase ۱.۵ and ۲ times respectively; compared to the values reported in the DIN EN ۷۵۵-۲ standard by performing the two-step aging cycle, consisting of the first-stage at ۱۷۵°C and the second step at ۶۵°C for ۱۰ hours. Moreover, using the proposed two-step aging, the heat treatment time was reduced considerably compared to the conventional precipitation hardening process.

نویسندگان

B. Mirzakhani

Department of Materials Science and Engineering, Faculty of Engineering, Arak University, Arak ۳۸۱۵۶-۸-۸۳۴۹, Iran.

Y. Payandeh

Department of Materials Science and Engineering, Faculty of Engineering, Arak University, Arak ۳۸۱۵۶-۸-۸۳۴۹, Iran.

H. Talebi

Department of Materials Science and Engineering, Faculty of Engineering, Arak University, Arak ۳۸۱۵۶-۸-۸۳۴۹, Iran.

M. Maleki

Department of Materials Science and Engineering, Faculty of Engineering, Arak University, Arak ۳۸۱۵۶-۸-۸۳۴۹, Iran.

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