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5. 760 ℃条件下DD6和DD5合金疲劳断口附近纵剖面显微组织的SEM像
Fig.5. SEM images of longitudinal sections near the fracture surface of fatigue-ruptured DD6 and DD5 alloys at 760 ℃(a, b) center and edge of DD6 alloy, respectively, σa=600 MPa, Nf =1.19×105 cyc(c, d) center and edge of DD5 alloy, respectively, σa=500 MPa, Nf =1.73×105 cyc (Arrow in Fig.5c shows the stress direction)
