Open Access Open Access  Restricted Access Subscription Access

Optimizing Fatigue Life of Micro Plasma Arc Welded Titanium (Ti-6Al-4V) Alloy Using Grey Relational Analysis

Mr. A. Sunny Kumar, Prof. T.V. Hanumantha Rao, Prof. V.V.S. Kesava Rao

Abstract


Titanium (Ti-6Al-4V) is widely used in aerospace industry and preparation of medical prostheses. There is a need to study the fatigue properties as they are subjected to repeated loading in service. In the present work, Micro Plasma Arc Welding (MPAW) is used to joint Titanium (Ti-6Al-4V) alloy sheets.Peak current, base current, pulse rate and pulse width are considered   as important welding parameters and fatigue life is considered as output response. In the present work Low cycle fatigue test is done under Tension-Tension mode. Sinusoidal loading is applied varying from 0.6 KN to 6 KN and keeping stress ratio at 0.1. Taguchi L25 orthogonal matrix is adopted by considering four factors and five levels of weld input parameters. Analysis of Variance (ANOVA) is carried out at 95% confidence level. Grey Relational Analysis is carried out by minimizing fatigue life to find the optimal combination of weld input parameters.  The order of importance of weld input parameters are also identified.

 


Full Text:

PDF

References


M. J. Donachie, Titanium A Technical Guide, 2nd ed. ASM International, 2000.

T.S.Balasubramanian,V.Balasubramanian and M.A.Muthumanikkam, Effect of Welding Processes on Fatigue Properties of Ti-6Al-4V Alloy Joints,World Academy of Science, Engineering and Technology International Journal of Mechanical and Mechatronics Engineering, Vol:5, No:2, 2011,pp.427 - 436.

Prashanth.A, Dr. K. Elangovan,Rodriguez Arthurs S .A, Design and analysis of Ti6AL4V Titanium specimens for enhancing fatigue life performance using ultrasonic impact treatment, International Journal of Engineering Research, Volume No.5 Issue: Special 6, 2016, pp: 1129 – 1254.

S.Q. Wang, J.H. Liu, D.L. Chen, Effect of Post-Weld Heat Treatment on the Fatigue Properties of Dissimilar Titanium Alloy Joints, 13th International Conference on Fracture,June 16–21, 2013, Beijing, China,pp.1-9.

Hong-Yu Qi, Li-Qiang Ma, Shao-Lin Li, Xiao-Guang Yang, Low cyclic fatique behaviour of electron beam welded Ti-6Al-4V titanium joint, Rare Met. 35(3), 2016,pp.230-234.

AndrzejKurek, Effect of Heat Treatment on the Fatigue Life of Steel-Titanium Bimetal, E3S Web of Conferences 19, 03015 (2017), pp.1-4.

H. Medekshas, Effect of elevated temperature and welding on low cycle fatigue strength of titanium alloys, MECHANIKA. 2008. Nr.2(70) ,pp.5-10.

Kondapalli Siva Prasad, Ch.SrinivasaRao, D.NageswaraRao, Optimization of fusion zone grain size, hardness and ultimate tensile strength of pulsed current micro plasma arc welded Inconel 625 sheets using genetic algorithm, International Journal of Advanced Manufacturing Technology (Springer), Volume.85, Issue.8-12, pp.2287-2295.

Kondapalli Siva Prasad, Ch.SrinivasaRao, D.NageswaraRao, Optimizing Fusion Zone Grain Size and Ultimate Tensile Strength of Pulsed Current Micro Plasma Arc Welded Inconel 625 Alloy Sheets using Hooke & Jeeves Method, International Transaction Journal of Engineering, Management & Applied Sciences &Technologies,Volume 3, No.1, 2012, pp.87-100.

Kondapalli Siva Prasad, Ch.SrinivasaRao, D.NageswaraRao, Effect of pulsed current micro plasma arc welding process parameters on fusion zone grain size and ultimate tensile strength of Inconel 625 sheets, ActaMetallurgicaSinica (English letters), Volume 25,Number 3, 2012,pp.179-189.


Refbacks

  • There are currently no refbacks.