第二代单晶高温合金高周疲劳行为研究
李嘉荣(
),谢洪吉,韩梅,刘世忠
),谢洪吉,韩梅,刘世忠
High Cycle Fatigue Behavior of Second Generation Single Crystal Superalloy
LI Jiarong(),XIE Hongji,HAN Mei,LIU Shizhong
),XIE Hongji,HAN Mei,LIU Shizhong
图3. 760和980 ℃条件下DD6与DD5合金疲劳断口宏观形貌的SEM像
Fig.3. Fracture surface SEM images of DD6 and DD5 alloys(a) DD6, 760 ℃, σa=700 MPa, Nf=5.74×104 cyc (b) DD5, 760 ℃, σa=600 MPa, Nf =8.96×104 cyc(c) DD6, 980 ℃, σa=460 MPa, Nf =4.57×106 cyc (d) DD5, 980 ℃, σa=500 MPa, Nf =5.84×105 cyc
