مطالعه مشخصات بافتی ناحیه جوش همزن اصطکاکی برنج تک فازی به وسیله آزمون پراش الکترون های برگشتی

حیدرزاده, اکبر; سعید, توحید

doi:10.30501/jamt.2017.70359

مطالعه مشخصات بافتی ناحیه جوش همزن اصطکاکی برنج تک فازی به وسیله آزمون پراش الکترون های برگشتی

نویسندگان

اکبر حیدرزاده ¹

توحید سعید ²

¹ دانشگاه شهید مدنی آذربایجان، دانشکده فنی و مهندسی، گروه مهندسی متالورژی و مواد ، تبریز، ایران.

² دانشگاه صنعتی سهند تبریز، دانشکده مهندسی متالورژی و مواد ، تبریز، ایران.

10.30501/jamt.2017.70359

چکیده

پیچیدگی تغییر‌شکل پلاستیک حین جوشکاری همزن اصطکاکی سبب می‌شود که جهت‌گیری بافت‌ در نقاط مختلف جوش تغییر کند. بنابراین، باید بافت اولیه حاصل از آزمون پراش الکترونهای برگشتی در چارچوب تغییر‌شکل برشی مرجع قرار نگرفته و انتقال بافت اولیه به چارچوب بافت برشی مرجع ضروری می‌باشد. در این پژوهش، به بررسی بافت جوش همزن اصطکاکی برنج تک‌فازی پرداخته شد. نتایج نشان داد که A_1^* (111)[1 ̅1 ̅2]،A_2^* (111)[112 ̅ ]، C {001}⟨110⟩ و گاوس {011}⟨100⟩ اجزاء اصلی تشکیل‌دهنده بافت در ناحیه جوش هستند. اجزاء بافت برشی (A_1^*، A_2^* و C) نشان‌دهنده تبلور مجدد دینامیکی پیوسته به عنوان سازوکار غالب و حضور بافت گاوس تاییدکننده تبلور مجدد دینامیکی ناپیوسته به عنوان سازوکار محتمل دیگر در پیدایش ریزساختار نهایی تعیین شد.

کلیدواژه‌ها

جوشکاری همزن اصطکاکی

بافت

تفرق الکترونهای برگشتی

برنج

عنوان مقاله English

Texture Analyses of Friction Stir Welded Single-phase Brass Using Electron Back Scattered Diffraction

نویسندگان English

Akbar Heidarzadeh ¹

Tohid Saeid ²

¹ Azarbaijan Shahid Madani University, Department of Materials Engineering, Tabriz, Iran.

² Sahand University of Technology, Department of Materials Engineering, Tabriz, Iran.

چکیده English

Complex plastic deformation during friction stir welding causes variation of texture in different locations of the joint. Therefore, the as-acquired texture data from electron backscattered diffraction analysis are not often in the shear deformation frame of reference. In this study, the texture components of the friction stir welded single phase brass was studied. The results showed that the texture of the joint contained A_1^* (111)[1 ̅1 ̅2], A_2^* (111)[112 ̅ ], C{001}⟨110⟩, and Goss{011}⟨100⟩ components. The existence of A_1^*, A_2^*, and C texture components revealed that the continuous dynamic recrystallization plays a dominant role in the microstructural evolution. In addition, the presence of Goss texture component showed that discontinues dynamic recrystallization may also participate in the new grain formation.

کلیدواژه‌ها English

Friction Stir Welding

Texture

Electron backscattered diffraction

Brass

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