Tribological Behaviors Analysis of Synthesized Chromel Composite

Fazil, B. Mohmed; Suresh, P.

doi:10.1590/1980-5373-MR-2022-0008

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Articles • Mat. Res. 25 • 2022 • https://doi.org/10.1590/1980-5373-MR-2022-0008 copy

Tribological Behaviors Analysis of Synthesized Chromel Composite

Authorship SCIMAGO INSTITUTIONS RANKINGS

This paper makes an investigation on the synthesis of tantalum carbide (TaC_x) based chromel composites and their tribological behaviour using pin on disc under various load conditions. The reinforced chromel alloy with TaC_x was prepared at the rate of 0, 3 and 6 wt.% of TaC using stir casting route. The wear resistance of composites was found to improve with the increase in weight percentage of TaC. The wear properties of Chromel-TaC_x composite were enhanced due to the presence of 6% TaC. The wear worn out surface of chromel composite was studied through microstructures. The optimal process factors and their effect on responses have been analyzed through Response Surface Methodology (RSM) and Analysis of Variance (ANOVA).

Keywords:
Chromel; Tantalum carbide; EDX; Worn surface morphology; Response surface methodology

S.No	Elements	Wt.%
1	Ni	89.01
2	Cr	09.43
3	Ta	01.10
4	C	00.46

	Input Factors			Responses
Exp. No.	P (N)	SD (m)	W (wt.%)	Wear (µm)	FF (N)
1	10	500	0	67.3	4.30
2	10	500	3	52.6	6.16
3	10	500	6	40.8	5.12
4	10	1000	0	77.8	5.32
5	10	1000	3	54.7	5.24
6	10	1000	6	42.5	5.82
7	10	1500	0	75.2	6.42
8	10	1500	3	70.5	6.24
9	10	1500	6	51.6	6.12
10	20	500	0	82.8	9.82
11	20	500	3	56.8	10.44
12	20	500	6	45.06	12.22
13	20	1000	0	87.65	14.2
14	20	1000	3	59.3	9.82
15	20	1000	6	63.3	12.12
16	20	1500	0	97.9	12.2
17	20	1500	3	89.5	10.92
18	20	1500	6	73.08	13.82
19	30	500	0	90.5	14.32
20	30	500	3	67.1	14.98
21	30	500	6	61.1	14.82
22	30	1000	0	92.6	17.64
23	30	1000	3	65.3	16.86
24	30	1000	6	61.8	17.92
25	30	1500	0	109.7	18.82
26	30	1500	3	99.5	19.88
27	30	1500	6	94.5	18.86

Source	DF	Adj SS	Adj MS	F-Value	P-Value	% of Contribution
Model	9	8685.58	965.06	27.94	< 0.005
Linear	3	8003.21	2667.74	77.25	< 0.005
Applied Load (C2)	1	2429.05	2429.05	70.33	< 0.005	30.35%
Sliding speed (C3)	1	2165.26	2165.26	62.7	< 0.005	27.06%
Wt.% (C4)	1	3408.9	3408.9	98.71	< 0.005	42.58%
Square	3	403.72	134.57	3.9	0.027
C2*C2	1	23.58	23.58	0.68	0.42
C3*C3	1	247.64	247.64	7.17	0.016
C4*C4	1	132.51	132.51	3.84	0.067
2-Way Interaction	3	278.65	92.88	2.69	0.079
C2*C3	1	195.21	195.21	5.65	0.029
C2*C4	1	8.33	8.33	0.24	0.63
C3*C4	1	75.1	75.1	2.17	0.159
Error	17	587.1	34.54
Total	26	9272.68

Source	DF	Adj SS	Adj MS	F-Value	P-Value	% of Contribution
Model	9	343.172	38.13	123.27	0.01
Linear	3	321.854	107.285	346.83	0.03
Applied Load (C2)	1	299.782	299.782	969.13	0.12	93.6
Sliding speed (C3)	1	21.303	21.303	68.87	0.011
Wt.% (C4)	1	0.769	0.769	2.49	0.133
Square	3	20.158	6.719	21.72	0.15
C2*C2	1	17.542	17.542	56.71	0.06
C3*C3	1	0.001	0.001	0	0.966
C4*C4	1	2.615	2.615	8.45	0.01
2-Way I	3	1.16	0.387	1.25	0.323
C2*C3	1	0.749	0.749	2.42	0.138
C2*C4	1	0.097	0.097	0.31	0.582
C3*C4	1	0.314	0.314	1.01	0.328
Error	17	5.259	0.309
Total	26	348.431

Response	Goal	Target	Upper	Weight	Importance
Wear	Minimum	4.3	15.28	1	1
Friction Force	Minimum	40.8	109.7	1	1
Solution	C2	C3	C4		Desirability
1	10	500	6		0.968152

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