Effect of mechanical vibrations on the wear behavior of AZ91 Mg alloy

International Conference on Advances in Metallurgy, Materials and Manufacturing

冶金学;材料科学;机械制造

Chaturvedi, V.^1 ; Pandel, U.^1 ; Sharma, A.^1

Department of Metallurgical and Materials Engineering, Malaviya National Institute of Technology, Jaipur, Rajasthan

302017, India^1

关键词: Constant amplitude;    Field emission scanning electron microscopy;    Pin-on-disc configuration;    Single mechanisms;    Sliding velocities;    Sliding wear tests;    Structural applications;    Wear mechanisms;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/314/1/012030/pdf
DOI  :  10.1088/1757-899X/314/1/012030

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

AZ91 Mg alloy is the most promising alloy used for structural applications. The vibration induced methods are effective and economic viable in term of mechanical properties. Sliding wear tests were performed on AZ91 Mg alloy using a pin-on- disc configuration. Wear rates were measured at 5 N and 10N at a sliding velocity of 1m/s for varied frequency within the range of 5- 25Hz and a constant amplitude of 2mm. Microstructures of worn surfaces and wear debris were characterized by field emission scanning electron microscopy (FESEM). It is observed that wear resistance of vibrated AZ91 alloy at 15Hz frequency ad 2mm amplitude was superior than cast AZ91 Mg alloy. Finer grain size and equiaxed grain shape both are important parameters for better wear resistance in vibrated AZ91 Mg alloys. FESEM analysis revealed that wear is considerably affected due to frictional heat generated by the relative motion between AZ91 Mg alloy and EN31 steel surface. No single mechanism was responsible for material loss.