مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

بررسی خواص مکانیکی نانوکامپوزیت فولاد زنگ‌نزن 316L تقویت‌شده با نانو ذرات TiC/hBN با نسبت وزنی 2 و 10درصد

نویسندگان
علی صدوقی 1
غلامحسن پایگانه 2
مهدی تاجداری 3
1 دانشگاه شهید رجایی، تهران
2 دانشگاه شهید رجایی
3 دانشگاه آزاد اسلامی- واحد اراک- دانشکده فنی مهندسی- گروه مکانیک
چکیده
روش متالورژی پودر یکی از روش‌های ساخت نانوکامپوزیت می‌باشد که در آن خواص نانوکامپوزیت‌ها بستگی به درصد تقویت‌کننده و پراکندگی آنها در ماتریس دارد. در این مقاله نانوکامپوزیت زمینه فلزی به روش متالورژی پودر با ماده پایه فولاد زنگ‌نزن 316L، که ماده‌ای پرکاربرد در صنعت می‌باشد، و ذرات تقویت‌کننده مخلوطی از کربیدتینانیوم به عنوان تقویت کننده پایه کربنی و هگزاگونال نیترید بور به عنوان ماده خود روانکار، تهیه شده‌است. پودرهای تقویت‌کننده در سایز میکرو انتخاب گردیدند و در آسیاب سیاره‌ای پودرهای مخلوط شدند تا به سایز نانو تبدیل برسند. پودرهای تقویت‌کننده پس از 30 ساعت آسیاب به سایز نانو رسیدند. سپس پودر فولاد زنگ‌نزن 316L و تقویت کننده‌ها با تسبت 2و 10 درصد وزنی به مدت 5 ساعت آسیاب شدند و تحت فشار400 مگاپاسکال فشرده و در دمای 1400 درجه سلسیوس و به مدت 3 ساعت در کوره‌ی خلا پخته شدند. نمونه‌ها تحت بررسی عکسبرداری الکترونی و آنالیز طیف سنجی الکترونی و آنالیز اشعه ایکس برای شناسایی میکروساختاری ماده قرارگرفتند و در ادامه خواص مکانیکی ماده از جمله سختی و سایش و خمش مورد بررسی قرار گرفتند. نتایج با نمونه‌ی فولاد زنگ‌نزن 316L بدون تقویت‌کننده مقایسه گردید. سختی و مقاومت سایشی ماده نانوکامپوزیت بهبود یافته است و استحکام خمشی در نمونه‌ی با 2 درصد وزنی تقویت‌کننده بهبود و در نمونه‌ی با 10 درصد وزنی تقویت‌کننده کاهش یافت.
کلیدواژه‌ها
نانوکامپوزیت
متالورژی پودر
خواص مکانیکی

موضوعات

عنوان مقاله English

Mechanical Behavior analysis of Stainless Steel 316L Nanocomposite Reinforcement by Nanoparticles TiC/hBN with 2 & 10 wt.%

نویسندگان English

Ali Sadooghi 1
Gholamhasan Payghaneh 2
Mehdi Tajdari 3
1 Department of Mechanical Engineering, Shahid Rajaee University, Tehran, Iran
2 Head Of faculty Of Mechanical Engineering
3 Department of Mechanical Engineering, Arak Branch, Islamic Azad University, Arak, Iran
چکیده English

Powder metallurgy process is commonly used to manufacture nanocomposite products, in which the product quality of this process depends upon Composite of reinforcement nanoparticle and distribution. In this article Metal Matrix Nanocomposite (MMN) by powder metallurgy with a base material stainless steel 316L, a material that is widely used in the industry, and reinforcement particles mixture of Carbide Titanium (TiC) as carbon-based reinforcing particles, and Hexagonal Nitride Boron (hBN) particles as the self-lubricating material is prepared. The reinforcement powders were micro Sized and mixed in high ball milling to reach Nano-sized, after 30 h mixing powders in high ball milling reach to Nano-sized, and then reinforcement Nanoparticles with 2 and 10 Wt.% Mixed with stainless steel 316L for 5 hours and compacted at 400 Mpa and sintered at 1400 C temperature and 3 Hours. Scanning electron microscope (SEM), Energy-dispersive X-ray Spectroscopy (EDX) and X-ray Diffraction (XRD) tests are performed on Powders to identify the nanocomposite microstructure. The Mechanical Properties such as Microhardness, Wear, and Bending Strength Were Analyzed. These results Compare with Results of stainless steel 316L without Reinforcement. Microhardness and abrasion resistance of Nanocomposite material have improved and flexural strength improved at the sample with 2 wt.% reinforcement and reduced at the sample with 10 Wt.%.

کلیدواژه‌ها English

Nanocomposite
Metallurgy Powder
mechanical behavior
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مهندسی مکانیک مدرس
دوره 18، شماره 5
شهریور 1397
صفحه 182-191