تحلیل حساسیت متغیرهای عملیات حرارتی بر خواص آلیاژ آلومینیم سرسیلندر به‌روش رگرسیون

مهندسی متالورژی و مواد

مقاله 5، دوره 32، شماره 1 - شماره پیاپی 23، اسفند 1399، صفحه 57-74   

نوع مقاله: علمی و پژوهشی

شناسه دیجیتال (DOI): 10.22067/ma.v32i1.80171

نویسندگان

محمدجعفر شریفی¹؛ محمد آزادی²؛ محبوبه آزادی^{* 3}

¹کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه سمنان، سمنان.

²دانشکده مهندسی مکانیک، دانشگاه سمنان، سمنان.

³دانشکده مهندسی مواد و متالورژی، دانشگاه سمنان، سمنان

چکیده

در این مقاله به‌روش تحلیل رگرسیون، الگوهای مناسبی برای سختی و ریزساختار آلیاژ آلومینیم سرسیلندر ارائه شده است. توابع هدف، سختی، اندازۀ فازها و میزان کروی‌بودن و متغیرها در آزمایش‌های تجربی شامل دما و زمان انحلال و پیرسازی انتخاب شدند. نتایج نشان داد که بیشینه سختی (164ویکرز) زمانی به‌دست می­آید که نمونه 300دقیقه در دمای C° 510 قرار گیرد و سپس، در دمای C° 175 به‌مدت 360دقیقه پیرسخت شود. همچنین، عملیات حرارتی بهینه برای دستیابی به کمترین اندازۀ مساحت فازها و کروی‌تربودن فازها مشخص شد. نتایج تحلیل رگرسیون نشان داد که زمان پیرسختی مؤثرتر از دما در تغییرات سختی است و دمای انحلال نسبت به دمای پیرسختی فاکتور مهم‌تری محسوب می‌شود.

کلیدواژه‌ها

آلیاژ آلومینیم؛ تحلیل حساسیت؛ عملیات حرارتی؛ ریزساختار؛ سختی

سایر فایل های مرتبط با مقاله

5-azadi.pdf

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