Crack Propagation Behavior at Sn37Pb-Copper Interface in Low Cycle Fatigue

2007 ◽  
Vol 353-358 ◽  
pp. 2962-2965
Author(s):  
Masao Sakane ◽  
Kazuhiro Itoh ◽  
Yutaka Tsukada ◽  
Kenji Terada
Keyword(s):  
Crack Propagation ◽  
Crack Path ◽  
Low Cycle Fatigue ◽  
Interfacial Crack ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
Cycle Fatigue ◽  
Propagation Behavior ◽  
Integral Range ◽  
Crack Propagation Behavior

This paper studies the crack propagation at Sn37Pb-copper interface in push-pull low cycle fatigue. Bonded specimens of Sn37Pb and copper having notch holes with different distances from the interface were fatigued at 313K and the crack propagation paths were observed. Cracks propagated at the interface when the notch hole was near the interface but propagated in the solder when the notch hole was away from the interface. The propagation rate of the interfacial crack was faster than that of non-interface crack. The crack path and crack propagation rate of the two types of cracks were discussed in relation to J integral range calculated by finite element method.

scholarly journals Crack Propagation Behavior of a Ni-Based Single-Crystal Superalloy during In Situ SEM Tensile Test at 1000 °C

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1047
Author(s):  
Wenxiang Jiang ◽  
Xiaoyi Ren ◽  
Jinghao Zhao ◽  
Jianli Zhou ◽  
Jinyao Ma ◽  
...  
Keyword(s):  
Crack Propagation ◽  
Tensile Test ◽  
Single Crystal ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
Single Crystal Superalloy ◽  
Propagation Path ◽  
Propagation Behavior ◽  
Crack Propagation Behavior

An in situ scanning electron microscope (SEM) tensile test for Ni-based single-crystal superalloy was carried out at 1000 °C. The stress displacement was obtained, and the yield strength and tensile strength of the superalloy were 699 MPa and 826 MPa, respectively. The crack propagation process, consisting of Model I crack and crystallographic shearing crack, was determined. More interestingly, the crack propagation path and rate affected by eutectics was directly observed and counted. Results show that the coalescence of the primary crack and second microcrack at the interface of a γ/γ′ matrix and eutectics would make the crack propagation rate increase from 0.3 μm/s to 0.4 μm/s. On the other hand, crack deflection decreased the rate to 0.05 μm/s. Moreover, movement of dislocations in front of the crack was also analyzed to explain the different crack propagation behavior in the superalloy.

Study of Crack Propagation Behavior on Low Cycle Fatigue in Squeeze Cast Aluminium Alloy

2000 ◽  
Vol 183-187 ◽  
pp. 1017-1022
Author(s):  
Kazuhiro Morino ◽  
Fumihito Nishimura ◽  
Kunimasa Takahashi ◽  
Yun Hae Kim ◽  
Hironobu Nisitani
Keyword(s):  
Crack Propagation ◽  
Aluminium Alloy ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Squeeze Cast ◽  
Cast Aluminium ◽  
Propagation Behavior ◽  
Crack Propagation Behavior
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