Sliding wear behavior of aluminum alloy coating prepared by two-wire electric arc spray process

2015 ◽  
Vol 85 (1-4) ◽  
pp. 237-252 ◽  
Author(s):  
Dalip Kumar ◽  
Qasim Murtaza ◽  
R. C. Singh
Author(s):  
A.P. Newbery ◽  
P.S. Grant ◽  
R.M. Jordan ◽  
A.D. Roche ◽  
T.C. Carr

Abstract The manufacture of tooling using the electric arc spray process to spray steel directly onto a master pattern offers substantial reductions in the lead times required to make complex tooling for polymer injection moulding and other applications. The process of spray forming is fast, efficient, and low cost, and has been shown to be dimensionally accurate with proper control over the residual stresses that develop during spraying. Poor dimensional control because of high internal stresses in thick arc sprayed steel coatings is well known, but these problems can be avoided by the use of correct spraying conditions. This paper describes the STD SPRAYFORM process for the manufacture of tooling for the polymer injection moulding of a component for a leading company in the U.S. The steps in the spray forming process, both before and after spraying, are described. The spray forming route competed directly with a traditional method for toolmaking and considerably reduced the lead time from order to completion. The tooling produced by spray forming has been operating commercially in production in the U.S. and has to date produced in the region of half a million parts without appreciable wear. The incorporation of contoured cooling channels during spraying has enabled plastic injection moulding cycle times to be decreased by 15%.


2017 ◽  
Vol 139 (4) ◽  
Author(s):  
N. Radhika ◽  
R. Raghu

LM13/AlN (10 wt. %) metal matrix composites (MMC) and unreinforced aluminum alloy were produced under stir casting route. Microstructural characteristics were examined on the developed composite using optical microscope. The hardness and tensile test were carried out on both unreinforced aluminum alloy and composite using Vickers hardness tester and universal testing machine (UTM), respectively. Dry sliding wear behavior of the composite and unreinforced aluminum alloy was evaluated using pin-on-disk tribometer based on the design of experiments approach. Experimental parameters such as applied load (10, 20, and 30 N), velocity (1, 2, and 3 m/s), and sliding distance (500, 1000, and 1500 m) were varied for three levels. Signal-to-noise (S/N) ratio analysis, analysis of variance, and regression analysis were also performed. The characterization results showed that reinforcement particles were uniformly distributed in the composite. The hardness and tensile test revealed greater improvement of property in composite compared to that of unreinforced alloy. Wear plot showed that wear was increased with increase in load and decreased with increase in velocity and sliding distance. S/N ratio analysis and analysis of variance (ANOVA) indicated that load has greater significance over the wear rate followed by velocity and sliding distance. Regression analysis revealed greater adequacy with the constructed model in predicting the wear behavior of composite and unreinforced aluminum alloy. Scanning electron microscopy (SEM) analysis is evident that the transition of wear from mild to severe occurred on increase of the load in the composite.


Wear ◽  
1997 ◽  
Vol 213 (1-2) ◽  
pp. 21-28 ◽  
Author(s):  
Szu Ying Yu ◽  
Hitoshi Ishii ◽  
Keiichiro Tohgo ◽  
Young Tae Cho ◽  
Dongfeng Diao

2014 ◽  
Vol 308 ◽  
pp. 363-371 ◽  
Author(s):  
Ge Hu ◽  
Huimin Meng ◽  
Junyou Liu

2017 ◽  
Vol 5 (2) ◽  
pp. 127-135 ◽  
Author(s):  
J. Allwyn Kingsly Gladston ◽  
I. Dinaharan ◽  
N. Mohamed Sheriff ◽  
J. David Raja Selvam

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