双级时效对7050铝合金力学性能及氢脆敏感性的影响

任建平,宋仁国

Effect of Two-stage Ageing on Mechanical Properties and Sensitivity to Hydrogen Embrittlement of 7050 Aluminum Alloy

Jianping REN,Renguo SONG

表3 7050铝合金慢应变拉伸力学性能

Table 3 Mechanical properties of 7050 aluminum alloy under the condition of tensile at low strain rate

Ageing state	Time / h	σ_0.2 / MPa	σ_k / MPa	δ / %	δ_loss / %
A(8 h)	0	549	539	13.6	0
	3	511	498	12.1	14.2
	6	477	472	12.9	17.6
	9	433	423	11.5	18.6
B(17 h)	0	580	567	13.3	0
	3	554	521	12.8	11.3
	6	512	498	12.5	13.6
	9	489	481	11.9	16.4
C(33 h)	0	552	541	13.0	0
C(33 h)	6	525	504	11.6	16.1
D(45 h)	0	589	571	12.7	0
	3	562	515	12.1	7.9
	6	514	508	11.8	14.1
	9	504	490	115	12.6
E(57 h)	0	548	533	11.1	0
E(57 h)	6	420	418	10.5	15.3