تأثیر عملیات رسوب‌گذاری بر همگن‌سازی و خواص مکانیکی آلیاژ FeNi1.5CrCu0.5 با آنتروپی بالا

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه صنعتی اصفهان، دانشکده مهندسی مواد، اصفهان، ایران، کدپستی: ۸۴۱۵۶۸۳۱۱۱

چکیده

این مطالعه به بررسی تأثیر عملیات رسوب‌گذاری بر ریزساختار و خواص مکانیکی آلیاژ آنتروپی بالای FeNi1.5CrCu0.5 پرداخته است. نمونه‌ها ابتدا در دمای 1080 درجه سانتی‌گراد به مدت 12 ساعت همگن‌سازی شدند و سپس تحت عملیات رسوب‌گذاری در دمای 800 درجه سانتی‌گراد به مدت‌های 6، 24 و 48 ساعت قرار گرفتند. ریزساختار نمونه‌ها با استفاده از میکروسکوپ‌های نوری و الکترونی روبشی بررسی شد. آزمون پراش پرتو ایکس تشکیل رسوبات Cr23C6 را تأیید کرد. نتایج نشان داد که عملیات رسوب‌گذاری به‌طور مؤثری نواحی غنی از کروم در مرزدانه‌ها را حذف کرده و منجر به ایجاد ریزساختار یکنواخت‌تری پس از نورد سرد و آنیل شد. بررسی خواص مکانیکی توسط آزمون سنبه برشی نشان داد که پس از نورد سرد با کاهش ضخامت 80 درصد و آنیل در دمای 1000 درجه سانتی‌گراد، نمونه‌های رسوب‌گذاری شده نسبت به نمونه‌های همگن شده بدون رسوب‌گذاری، استحکام و شکل‌پذیری بهتری از خود نشان دادند. تشکیل رسوبات Cr23C6 و کاهش اندازه دانه‌ها عوامل اصلی بهبود خواص مکانیکی بودند. این مطالعه نشان داد که عملیات رسوب‌گذاری به‌طور قابل‌توجهی استحکام و شکل‌پذیری آلیاژ FeNi1.5CrCu0.5 را بهبود می‌بخشد. 

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Influence of Precipitation Treatment on the Homogenization and Mechanical Properties of FeNi1.5CrCu0.5 High-Entropy Alloy

نویسندگان [English]

  • F. Salimyanfard
  • M.R. Toroghinejad
  • M. Alizadeh
Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
چکیده [English]

This study investigates the effect of precipitation treatment on the microstructure and mechanical properties of the high-entropy FeNi1.5CrCu0.5 alloy. The samples were first homogenized at 1080 °C for 12 hours, followed by precipitation treatment at 800 °C for 6, 24, and 48 hours. The microstructure of the samples was examined using optical and scanning electron microscopy. X-ray diffraction patterns confirmed the formation of Cr23C6 precipitates. The results demonstrated that the precipitation treatment effectively eliminated chromium-rich regions at the grain boundaries, and resulted in a more uniform microstructure after cold rolling and subsequent annealing. Mechanical properties, analyzed through shear punch testing, revealed that following cold rolling with an 80% thickness reduction and annealing at 1000 °C, the precipitated samples exhibited superior strength and ductility compared to the homogenized sample. The formation of Cr23C6 precipitates and the reduction in grain size were primary factors contributing to the improved mechanical properties. This study demonstrated that precipitating treatment significantly enhanced the strength and ductility of the FeNi1.5CrCu0.5 alloy.

کلیدواژه‌ها [English]

  • High-entropy alloy
  • Chromium segregation
  • Precipitation
  • Cold-rolling
  • Grain size reduction

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مواد پیشرفته در مهندسی
دوره 43، شماره 2
شهریور 1403
صفحه 1-16

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