Optimization of Cryogenic Process Parameters for the Minimization of Surface Residual Stress in Pure Iron Using Taguchi Design

Table 3

L9 experimental program.

Exp. no.			S/N()	S/N()
1	431	230	−52.6895	−47.2346
2	399	195	−52.0195	−45.8007
3	352	194	−50.9309	−45.756
4	517	272	−54.2698	−48.7126
5	509	239	−54.1344	−47.568
6	420	220	−52.465	−46.8485
7	563	299	−55.0102	−49.5134
8	510	242	−54.1514	−47.6763
9	462	249	−53.2928	−47.924