Optimization of Forging Process Parameters and Prediction Model of Residual Stress of Ti-6Al-4V Alloy

Table 5

Regression analysis of sample data (925°C–980°C).

Sample	T	D	S	σ (MPa)
1	925	40	100	18.5
2	925	60	500	17.4
3	925	50	100	18
4	925	60	100	18.5
5	950	50	100	15.3
6	950	60	1000	14.3
7	950	70	500	15.5
8	950	50	300	14.9
9	950	60	500	14.6
10	950	40	1000	14.4
11	950	60	300	15.1
12	950	50	1000	14.4
13	950	40	100	15.3
14	975	40	500	11.4
15	975	40	100	12.2
16	975	50	100	12.6
17	975	70	100	13.5
18	975	40	1000	11.1
19	975	50	1000	11.8
20	975	70	300	12.6
21	980	40	300	11.4
22	980	50	100	12.1
23	980	40	1000	10.5
24	980	50	500	11.5
25	980	70	100	12.4