Qysryan, A., Abasi, M. (2016). Investigation into Aging Effect on Wear Behavior of Titanium Alloy. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(3), 553-568.
Amir Qysryan; Mahmood Abasi. "Investigation into Aging Effect on Wear Behavior of Titanium Alloy". Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9, 3, 2016, 553-568.
Qysryan, A., Abasi, M. (2016). 'Investigation into Aging Effect on Wear Behavior of Titanium Alloy', Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(3), pp. 553-568.
Qysryan, A., Abasi, M. Investigation into Aging Effect on Wear Behavior of Titanium Alloy. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 2016; 9(3): 553-568.
Investigation into Aging Effect on Wear Behavior of Titanium Alloy
1MA, identification and selection of materials engineering, University of Kashan, Kashan, Iran.
2Assistant Professor, Faculty of Engineering, Department of Materials and Metallurgical Engineering, University of Kashan, Kashan, Iran
Abstract
Ti-6Al-4V titanium alloy has great application in medicine and military industries due to its capabilities, namely high strength to weight ratio and corrosion resistance. In the current research, the effect of aging treatment on microstructure and wear behavior of Ti-6Al-4V titanium alloy was investigated. Pin on disk wear test was applied to assess the wear behavior. Specimens were first solution treated at 950 C and 1050 C and then were quenched and aged. Some specimens were annealed before aging at 700 C. The results showed that aging treatment resulted in the hardness increase and the wear resistance decrease. It was also observed that annealing treatment before aging, enhanced the martensite decomposition and the formation of 2 particles, and correspondingly resulted in more hardness and lower wear resistance. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses confirmed that presence of hard phase 2 particles within soft beta phase was the main reason for wear resistance decrease.
بررسی اثر عملیات پیرسازی بر روی رفتار سایشی آلیاژ تیتانیوم
Authors [Persian]
امیر قیصریان1; محمود عباسی2
1کارشناس ارشد، شناسایی و انتخاب مواد مهندسی، دانشگاه کاشان، کاشان، ایران.
2استادیار دانشکده مهندسی، گروه مهندسی مواد و متالورژی، دانشگاه کاشان، کاشان، ایران.
Abstract [Persian]
با توجه به ویژگیهای مورد توجه آلیاژ تیتانیوم Ti-6Al-4V از قبیل نسبت استحکام به وزن بالا و مقاومت به خوردگی مناسب، این آلیاژ استفاده زیادی در صنایع نظامی و پزشکی دارد. در این تحقیق، به بررسی اثر عملیات پیرسازی بر ریزساختار و رفتار سایشی آلیاژ Ti-6Al-4V با استفاده از آزمون سایش پین بر دیسک پرداخته شد. نمونههایی از آلیاژ مورد مطالعه در دو دمای مختلف، 950 و 1050 درجه سانتیگراد مورد عملیات انحلالی قرار گرفتند و سپس نمونهها سرد و پیرسازی شدند. بعضی از نمونهها پیش از پیرسازی، در دمای C 700 آنیل شدند. نتایج نشان داد که رفتار سایشی آلیاژ تیتانیوم مورد مطالعه از قانون آرچارد تبعیت نکرد و پیرسازی علیرغم افزایش سختی، سبب کاهش مقاومت به سایش شد. همچنین مشاهده شد که انجام آنیل میانی پیش از پیرسازی اگرچه سبب تسریع تجزیه فاز مارتنزیت تشکیل شده در مرحله کوئنچ و تشکیل ذرات فاز آلفا (α2) شد و در نتیجه سختی پس از پیرسازی را افزایش داد اما در نهایت کاهش مقاومت به سایش را سبب شد. بررسی میکروسکوپ الکترون روبشی (SEM) و پراش اشعه ایکس (XRD) نشان داد که مهمترین دلیل کاهش مقاومت به سایش با انجام پیرسازی، حضور فاز سخت آلفا (α2) در کنار فاز نرم بتا در ریزساختار نمونه پیرسازی شده بود.
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