Process Optimization and Wear Behavior of Red Mud Reinforced Aluminum Composites

Table 2

Grey relational analysis.

S. number	ratio (dB)		Data preprocessing		Grey relational coefficient		Grey relational grade	Order
	Specific wear rate	COF	Specific wear rate	COF	Specific wear rate	COF
1	−10.542	6.213823	0.50627	0.62920	0.660332	0.063161	0.723493	20
2	−15.944	8.754143	0.612864	0.30747	0.736494	0.04612	0.782614	15
3	−18.3153	11.18182	0.659657	0	0.775772	0.036667	0.812439	13
4	−18.0558	4.761443	0.654537	0.81315	0.771272	0.080076	0.851348	11
5	−22.4217	8.290785	0.740688	0.36615	0.854708	0.048508	0.903216	5
6	−23.6591	8.971	0.765104	0.28000	0.881742	0.045082	0.926824	2
7	−12.6065	10.11691	0.547008	0.13487	0.687503	0.040289	0.727792	19
8	−22.6497	8.134279	0.745186	0.38597	0.859563	0.049371	0.908934	4
9	−21.0531	10.60356	0.713681	0.07323	0.826674	0.038549	0.865222	9
10	−1.86143	3.999413	0.334979	0.90966	0.566237	0.093168	0.659405	24
11	−3.86249	4.222498	0.374465	0.88141	0.585469	0.088912	0.674381	22
12	−14.8413	10.03379	0.591106	0.14540	0.719553	0.040602	0.760156	18
13	−1.01223	3.286189	0.318222	1	0.558452	0.11	0.668452	23
14	−23.6705	7.9588	0.76533	0.40820	0.882	0.050376	0.932376	1
15	−20.4813	5.005274	0.702399	0.78227	0.815499	0.076631	0.89213	6
16	−17.3482	7.618133	0.640573	0.45134	0.759258	0.052448	0.811706	14
17	−18.4535	5.596814	0.662384	0.70735	0.778191	0.069388	0.847578	12
18	−14.385	8.268254	0.582101	0.36901	0.712768	0.04863	0.761398	16
19	18.86953	3.661923	−0.0741	0.95241	0.422467	0.100441	0.522908	27
20	13.35527	4.436975	0.034713	0.85425	0.453065	0.085172	0.538238	26
21	−20.0999	8.068058	0.694872	0.39436	0.808211	0.049745	0.857956	10
22	0.063815	4.222498	0.296989	0.88141	0.54889	0.088912	0.637802	25
23	−20.2203	6.70716	0.697248	0.56672	0.810497	0.058932	0.86943	8
24	−22.7325	7.937113	0.74682	0.41095	0.861341	0.050503	0.911844	3
25	−10.2883	7.432221	0.501263	0.47489	0.65714	0.053653	0.710793	21
26	−21.0146	8.290785	0.71292	0.36615	0.82591	0.048508	0.874418	7
27	−14.5979	9.093858	0.586302	0.26444	0.715918	0.044514	0.760432	17