Effects of local microstructure on crack initiation in super martensitic stainless steel under very-high-cycle fatigue

Xue, Li; DAI, Yajun; WANG, Xiangyu; Liu, Yongjie; Yao, Chen; Wang, Chong; Zhang, Hong; Li, Lang; LIU, Hanqing; He, Chao; Wang, Hongtao

doi:10.1016/j.ijfatigue.2022.107019

Cited by 23 publications

(13 citation statements)

References 33 publications

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“…At the end of the experiment, the fracture morphology of the failed sample was observed, and it could be found as described above that the VHCF crack of the material was initiated at the internal inclusion or matrix at RT, 39 while the VHCF crack was initiated at the surface of the sample at ET. The change of the VHCF crack initiation mechanism caused by temperature deserves our attention.…”

Section: Resultsmentioning

confidence: 84%

“…The fatigue test results at ET and room temperature (RT) 39 were obtained for the fatigue life ranging from 10 5 to 10 9 load cycles for the SMSS (Figure 3). The results indicate that the alloy exhibited a gradual decreasing type of S–N curve at both RT and ET.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, the continuous slip with time also increases the area of the smooth region, which together leads to the increase of the smooth region. The area of FGA changed from continuous FGA at RT 39 to discontinuous FGA at ET under the influence of multipoint slip, grain refinement was somewhat inhibited, and the trend of increasing with life was no longer obvious. However, the aFGA at ET is still higher than that at RT (93 um), indicating that elevated temperature increased the grain slip and refinement.…”

Section: Discussionmentioning

confidence: 97%

“…At the end of the experiment, the fracture morphology of the failed sample was observed, and it could be found as described above that the VHCF crack of the material was initiated at the internal inclusion or matrix at RT, 39 surface. Around the initiation site, there was an obvious semicircular FGA, forming the initiation characteristic area (ICA) of the surface initiation.…”

Section: Fractography At Etmentioning

confidence: 89%

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Effects of microstructure on crack initiation in super martensitic stainless steel under very‐high‐cycle fatigue at elevated temperature

Wang

et al. 2022

Fatigue Fract Eng Mat Struct

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The present study envisaged the behavior and relevant crack initiation mechanism of super martensitic stainless steel (0Cr13Ni5Mo) at elevated temperature (ET) under very-high-cycle fatigue (VHCF). Fractographic analysis revealed that all the VHCF cracks of the failure specimens initiated from the surface and formed fine granular area (FGA) morphology at ET in an absence of vacuum. The initiation characteristic area (ICA) consisted of an initiation site, a relatively smooth area, and the annular continuous FGA. FGA was formed in the peaks and valleys of local microstructures, and the smooth regions connected these peaks and valleys dominated by shear stress. It was observed that the FGA was unevenly distributed on the crack surface related to the local microstructure and below the grain surface relevant to local strain distribution. The stress intensity factor (SIF) and the crack tip plastic zone of the ICA slightly changed with temperature.

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 97%

“…At the end of the experiment, the fracture morphology of the failed sample was observed, and it could be found as described above that the VHCF crack of the material was initiated at the internal inclusion or matrix at RT, 39 surface. Around the initiation site, there was an obvious semicircular FGA, forming the initiation characteristic area (ICA) of the surface initiation.…”

Section: Fractography At Etmentioning

confidence: 89%

See 2 more Smart Citations

Effects of microstructure on crack initiation in super martensitic stainless steel under very‐high‐cycle fatigue at elevated temperature

Wang

et al. 2022

Fatigue Fract Eng Mat Struct

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“…Haidari et al [26][27][28][29][30] analyzed the fatigue life of the wheel under thermal load, found the importance of fatigue life under thermal load through the comparison of mechanical analysis and thermal-load coupling analysis, and determined the contact stress through Hertz contact theory. Li et al 31,32 studied the fatigue crack initiation behavior of martensitic stainless steel from the perspective of local microstructure and obtained that the crystal fracture region was caused by the cracking process dominated by slip, and the direction of the fatigue crack was close to the plane of maximum shear stress.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the heat energy and multi‐level load on subsurface fatigue damage evolution via multi‐scale method

Hao

Qian

et al. 2023

Fatigue Fract Eng Mat Struct

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The relationship between heat energy and initial fatigue life of different metals under multi-level loading stress and elevated temperature is introduced. The fatigue damage evolution model was established from the microscopic and mesoscopic perspectives to explore the fatigue damage and the crack initiation location at elevated temperature. Based on the method of continuous damage mechanics, the influence of multi-level loads on fatigue cracking life and heat energy on strain energy of distribution were investigated. The mathematical model is verified by the experimental data. The model has important engineering significance for predicting the service life of parts at elevated temperature. K E Y W O R D S elevated temperature, fatigue crack, heat energy, multi-level load, multi-scale Highlights 1. Fatigue damage model is established by the coupling of microcosmic and microcosmic.2. The relationship between heat energy and fatigue life is discussed.3. The influence of heat energy on sub-surface damage of parts was investigated.4. Considering the influence of heat energy to improve the accuracy of fatigue model.

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Very high-cycle fatigue behavior of steel in hydrogen environment: State of the art review and challenges

Yang,

De Jesus,

Meng

et al. 2024

Engineering Failure Analysis

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Effects of local microstructure on crack initiation in super martensitic stainless steel under very-high-cycle fatigue

Cited by 23 publications

References 33 publications

Effects of microstructure on crack initiation in super martensitic stainless steel under very‐high‐cycle fatigue at elevated temperature

Effects of microstructure on crack initiation in super martensitic stainless steel under very‐high‐cycle fatigue at elevated temperature

Investigation of the heat energy and multi‐level load on subsurface fatigue damage evolution via multi‐scale method

Very high-cycle fatigue behavior of steel in hydrogen environment: State of the art review and challenges

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