Abstract




 
   

IJE TRANSACTIONS B: Applications Vol. 32, No. 2 (February 2019) 306-312    Article in Press

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  METALLURGICAL AND MECHANICAL BEHAVIOR OF AISI 316- AISI 304 DURING FRICTION WELDING PROCESS
 
A. Jabbar Hassan, T. Boukharouba, D. Miroud and S. Ramtani
 
( Received: November 04, 2018 – Accepted in Revised Form: January 03, 2019 )
 
 

Abstract    Present study focuses on the micro-structural and mechanical behavior effect of friction time for similar (AISI 316-AISI 316 and AISI 304-AISI 304) and dissimilar (AISI 304-AISI 316) joint during continuous drive friction welding. The welding carried out with different friction time: 6.5, 8.5 and 10 s while kept all other conditions constant. The effect of that time on the strength, structural and behavior of welded metals was investigated by Energy Dispersive Spectroscopy (EDAX), Scanning Electron Microscope (SEM), micro-hardness and tensile test. The obtained results illustrated that the friction time extended was responsible on some harmful mechanical and micro-structural properties of the welded joint. Therefore, increasing in friction time is led to reduce of Ultimate Tensile Strength (UTS), reduce of ductility, increasing in level of micro-hardness and larger HPDZ, that was clearly observed in similar joint (AISI 316-AISI 316 and AISI 304-AISI 304).

 

Keywords    Austenitic stainless steel, Friction time, Microstructure, Micro-hardness, Ultimate tensile strength

 

چکیده   

در حال حاضر مطالعه بر روی رفتار اصطکاکی میکرو سازه و مکانیکی برای مشابه (AISI 316-AISI 316 و AISI 304-AISI 304) و غیر متقابل (AISI 304-AISI 316) در طی جوشکاری اصطکاک مداوم درایو تمرکز دارد. جوشکاری انجام شده با زمان اصطکاک مختلف: 6.5، 8.5 و 10 ثانیه در حالی که تمام شرایط دیگر را ثابت بوده است. اثر آن زمان بر قدرت، ساختار و رفتار فلزات جوش داده شده توسط اسپکتروسکوپ پراکندگی انرژی (EDAX)، میکروسکوپ الکترونی اسکن (SEM)، میکرو سختی و آزمون کشش مورد بررسی قرار گرفت. نتایج به دست آمده بیانگر آن است که زمان اصطکاک طولی بر برخی خواص مکانیکی و میکرو سازه جوش داده شده است. بنابراین، افزایش زمان اصطکاک باعث کاهش شدت مقاومت کششی (UTS)، کاهش قابلیت انعطاف پذیری، افزایش سطح میکرو سختی و افزایش HPDZ می شود که به طور واضح در مفصل مشابه دیده می شود (AISI 316-AISI 316 و AISI 304- AISI 304).

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