توسعه تکنیک‌های مداوم به منظور اصلاح فرایند فشردن در کانال همسان زاویه‌دار

نوع مقاله: مقاله علمی ترویجی

نویسندگان

1 دانشگاه بیرجند

2 دانشگاه صنعتی شاهرود

چکیده

یکی از موثرترین تکنیک های روش تغییرشکل پلاستیک شدید به منظور ایجاد ساختار فوق ریزدانه در مواد، تکنیک فشردن در کانال همسان زاویه دار یا (ایکپ) می باشد. در دو دهه گذشته شاهد تحولات زیادی در نحوه ی طراحی قالب و ایجاد تغییرات در تکنیک ایکپ بوده ایم. در مقاله حاضر به توصیف انواع مختلفی از تکنیک های ایکپ که اخیرا توسعه یافته و درصدد حل مشکلات فرایند ایکپ سنتی بوده؛ پرداخته شده است. همچنین نگاه ویژه ای به استفاده از تکنیک فشردن در کانال همسان زاویه دار به صورت مداوم یا ایکپ-کانفرم (ECAP-Conform) در ایجاد ساختار فوق ریزدانه شده است. این تکنیک در واقع ترکیبی از تکنیک فشردن در کانال همسان زاویه دار یا ایکپ و فرایند کانفرم می باشد؛ که به عنوان یک راه حل برای تولید مداوم مواد ریزساختار ارائه شده است. نتایج نشان دهنده موثر بودن استفاده از این تکنیک در تولید مواد ریزدانه به عنوان روش تغییرشکل پلاستیک شدید و حذف محدودیت های موجود در تکنیک ایکپ می باشد.

کلیدواژه‌ها

موضوعات


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