Performance studies on hybrid nano-metal matrix composites for wear and surface quality

Figures & Tables

Factors	Level 1	Level 2	Level 3
Compositeidentification(Alumina wt.%)	E8 (C1)(1%: Nano Al₂O₃ + 5.5%:Micro Al₂O₃)	E9 (C2)(2%: Nano Al₂O₃ +7%:Micro Al₂O₃)	E2 (C3)(2%: Nano Al₂O₃ + 5.5%:Micro Al₂O₃)
Sliding load (N)	20	40	60
Sliding velocity (m/s)	1	2	3
Temperature (C)	30	150	300

Parameters	Details
Wear test standard	ASTM-G99
Pin material	Hybrid AMMC (SAAW with nano and micro Al₂O₃)Size: diameter: 10 mm, length: 30 mm
Disc material	Hard bearing steel EN31 Size: Dia: 100, Thickness: 8 mm; Initial roughness, Ra:0.20–0.25 μm
Load applied	20, 40, & 60 N
Sliding velocity	1-3 m/s
Test Duration	1500 s
Sliding distance	50-120mm
Temperature	30, 150 & 300°C
Sliding condition	Dry

Si +	Si −	Pi (Pref.value)	TOPSIS Ranking
0.0603	0.1975	0.6490	4
0.0748	0.1383	0.6251	5
0.1295	0.0857	0.3982	8
0.0867	0.1445	0.8052	1
0.1281	0.0871	0.4047	7
0.1995	0.0405	0.1687	9
0.0443	0.1829	0.7661	2
0.0654	0.1820	0.7358	3
0.3377	0.3590	0.5153	6

Expt No	Composite identification	COF	Wear (gms)	Surface roughness Ra (μm)	STDEV of COF	STDEV of Wear (gms)
1	C1	0.424	0.02063	0.910	0.0071	0.0003
2	C1	0.51	0.02197	1.852	0.0141	0.0007
3	C1	0.586	0.03795	3.279	0.0184	0.0014
4	C2	0.382	0.00402	0.322	0.0141	0.0007
5	C2	0.409	0.02665	2.944	0.0049	0.0017
6	C2	0.562	0.02274	4.863	0.0141	0.0007
7	C3	0.509	0.00804	0.405	0.0064	0.0007
8	C3	0.408	0.0174	0.604	0.0071	0.0000
9	C3	0.697	0.65243	2.098	0.0028	0.0356

Symbol	Factors	df	SS	MS	F	% contribution
A	Reinforcement (wt. %)	2	0.0681	0.0341	0.1065	19.4063
B	Sliding load (N)	2	0.2188	0.1094	0.3421	62.3338
C	Sliding velocity (m/s)	2	0.0329	0.0164	0.0514	9.3644
D	Temperature (deg.C)	2	0.0312	0.0156	0.0488	8.8955
E	Error	1	0.3198	0.3198		0.0000
E	Total	9	0.6708	0.0745		100