Investigation on wear and corrosion behavior of equal channel angular pressed aluminium 2014 alloy

International Conference on Advances in Metallurgy, Materials and Manufacturing

冶金学;材料科学;机械制造

Divya, S.P.^1,2 ; Yoganandan, G.^2 ; Balaraju, J.N.^2 ; Srinivasan, S.A.^1 ; Nagaraj, M.^1 ; Ravisankar, B.^1

Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli, India^1

Surface Engineering Division, National Aerospace Laboratories, Bangalore, India^2

关键词: 3.5% nacl solutions;    Charge transfer resistance;    Coefficient of frictions;    Corrosion behavior;    Corrosion potentials;    Dry sliding wear test;    Equal channel angular pressed;    Pin on disc tribometer;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/314/1/012024/pdf
DOI  :  10.1088/1757-899X/314/1/012024

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Aluminium 2014 alloy solutionized at 495°C, aged at 195°C was subjected to Equal Channel Angular Pressing (ECAP). Dry sliding wear tests were conducted using pin on disc tribometer system under nominal loads of 10N and 30N with constant speed 2m/s for 2000m in order to investigate their wear behavior after ECAP. The Co-efficient of friction and loss in volume were decreased after ECAP. The dominant wear mechanism observed was adhesion, delamination in addition to these wear mechanisms, oxidation and transfer of Fe from the counter surface to the Al 2014 pin were observed at higher loading condition. The corrosion behavior was evaluated by potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) in 3.5% NaCl solution. The results obtained from PDP showed higher corrosion potential and lower corrosion density after ECAP than base. Electrochemical impedance spectroscopy (EIS) showed higher charge transfer resistance after ECAP. Surface morphology showed decreased pit size and increased oxygen content in ECAP sample than base after PDP.