تحلیل پدیده شکست ورق دولایه آلومینیوم-مس تغییرشکل یافته در فرآیند شکل دهی تدریجی تک نقطه ای

نوع مقاله : مقاله پژوهشی

نویسندگان

علی زاهدی

زهرا سادات امینی

سید محمد عرب

گروه مهندسی مواد، ساخت و تولید، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران.

10.22067/jacsm.2025.95791.1365

چکیده

چکیده

در این پژوهش رفتار شکست ورق دولایه آلومینیوم- مس طی فرآیند شکل‌دهی تدریجی تک‌نقطه‌ای در طی آزمون های تجربی تحلیل شده است. برای این منظور ورق دولایه با روش جوشکاری انفجاری تولید شده و سپس طی فرایند شکل دهی تدریجی تغییر شکل داده شده است. به منظور مقایسه با وضعیت تنش تک محوری، آزمون کشش تک‌محوری نیز بر روی ورق‌های دو لایه صورت گرفت. بررسی‌های ریزساختاری با OM و SEM بر روی مقاطع شکست در دو وضعیت انجام گردید. نتایج آزمون‌های کشش نشان داد که استحکام شکست نمونه دولایه با افزایش % 70 نسبت به ورق آلومینیوم تک‌لایه به 317 مگاپاسکال رسیده و ازدیاد طول نیز از % 8/5 به % 5/7 افزایش یافته است که بیانگر چقرمگی بالاتر نمونه دولایه است. همچنین، بررسی سطح شکست نشان داد که در پدیده شکست در فرایند شکل‌دهی تدریجی و کشش تک‌محوری، آلومینیوم رفتار ترد و مس رفتار نرم از خود نشان می‌دهد. ریزساختار فصل مشترک حاوی ترکیبات بین‌فلزی بوده و آنالیز EDS افزایش سختی در ناحیه پیوند را تأیید کرد.

کلیدواژه‌ها

ورق دولایه

سطح شکست

ریزساختار

SEM

موضوعات

• شکل دهی

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عنوان مقاله English

The Analysis of Fracture Phenomenon of the Deformed Aluminum-Copper Bimetallic Sheet in the Single Point Incremental Forming

نویسندگان English

Ali Zahedi

Zahra Sadat Amini

Seyed Mohammad Arab

Department of Materials and Manufacturing, University of Mohaghegh Ardabili, Ardabil, Iran.

چکیده English

In this study, the fracture behavior of aluminum-copper bimetallic sheet during single-point incremental forming process has been analyzed during experimental tests. For this purpose, the bimetallic sheet was produced by explosive welding method and then deformed during incremental forming process. To provide a basis for comparison with the uniaxial stress condition, uniaxial tensile tests were also conducted on the bimetallic sheets. Microstructural examinations of the fracture zones in both conditions were carried out using optical microscopy (OM) and scanning electron microscopy (SEM). The tensile test results indicated that the fracture strength of the bimetallic specimen increased by 70% compared to the monolithic aluminum sheet, reaching 317 MPa, while elongation improved from 8.5% to 7.5%, suggesting higher toughness in the bimetallic sample. Moreover, fracture surface observations revealed that aluminum exhibited brittle behavior, whereas copper showed ductile fracture under both incremental forming and uniaxial tensile loading. The interfacial microstructure contained intermetallic compounds, and energy-dispersive spectroscopy (EDS) confirmed hardness increase within the bonding region.

کلیدواژه‌ها English

Bimetallic Sheet

Fracture Surface

Microstructure

SEM

مراجع

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