陈佳语等：GH720Li合金长期时效过程中Y相演变规律 1613* 200nm 200nm 200im ”00四 图4720℃经不同时间时效后二次Y强化相的演变规律.(a)30h:(b)100h:(c)200h:(d)500h:(e)1000h:(02000h:(g)3000h: (h)4000h:(i)5000h Fig.4 Variation of the secondary yphase in CH720Li alloy aged at 720C for different time:(a)30h:(b)100h;(e)200h:(d)500h:(e) 1000h:(f)2000h:(g)3000h:(h)4000h:(i)5000h b) μm (el 图5800℃经不同时间时效后一次y强化相的演变规律.(a)30h:(b)100h:(c)200h:(d)500h:(c)1000h Fig.5 Variation of the primary Yphase in GH720Li alloy aged at 800C for different time:(a)30h:(b)100h:(c)200h:(d)500h:(e)1000 h陈佳语等: GH720Li 合金长期时效过程中 γ'相演变规律 图 4 720 ℃经不同时间时效后二次 γ'强化相的演变规律． ( a) 30 h; ( b) 100 h; ( c) 200 h; ( d) 500 h; ( e) 1000 h; ( f) 2000 h; ( g) 3000 h; ( h) 4000 h; ( i) 5000 h Fig． 4 Variation of the secondary γ' phase in GH720Li alloy aged at 720 ℃ for different time: ( a) 30 h; ( b) 100 h; ( c) 200 h; ( d) 500 h; ( e) 1000 h; ( f) 2000 h; ( g) 3000 h; ( h) 4000 h; ( i) 5000 h 图 5 800 ℃经不同时间时效后一次 γ'强化相的演变规律． ( a) 30 h; ( b) 100 h; ( c) 200 h; ( d) 500 h; ( e) 1000 h Fig． 5 Variation of the primary γ' phase in GH720Li alloy aged at 800 ℃ for different time: ( a) 30 h; ( b) 100 h; ( c) 200 h; ( d) 500 h; ( e) 1000 h · 3161 ·