Investigation of crack initiation mechanisms responsible for the fish eye formation in the Very High Cycle Fatigue regime
Source abstract
Abstract
Abstract The present paper aims to explain the subsurface crack formation occurring in the Very High Cycle Fatigue domain for bcc steels. For this purpose, two high strength steels (a low alloyed steel AISI 5120 and a martensitic stainless steel X40CrMo13) were studied under ultrasonic push-pull fatigue tests. For all tests, a fish eye developed before fracture and, in most cases, the subsurface crack initiation originated from inclusions. Also, during fatigue tests for both materials, the thermal field on specimen surface was recorded by infrared camera and fracture surface observations were performed by Scanning Electron Microscopy (SEM). The SEM pictures reveal the presence of a Fine Granular Area (FGA) surrounding the inclusion in the crack initiation stage. Moreover, earlier in the crack process, slips markings were found in the matrix inside the inclusion dimple indicating that some similarities exist between surface and subsurface crack initiation mechanisms.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · Surface Treatment and Residual Stress · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (40)
Show source-provided references
1. On “multi-stage” fatigue life diagrams and the relevant life-controlling mechanisms in UHCF10.1046/j.1460-2695.2002.00550.x ↗
2. Bathias · 2004
3. Suresh · 1998
4. Subsurface crack initiation and propagation mechanism in the gigacycle fatigue10.1016/j.actamat.2010.07.022 ↗
5. Fatigue crack growth from small to long cracks in VHCF with surface initiations10.1016/j.ijfatigue.2007.03.015 ↗
6. Fatigue crack growth from small to long cracks in very high cycle fatigue with surface and internal «fish eyes» failures for ferritic- pearlitic low carbon steels SAE 862010.1016/j.msea.2006.08.131 ↗
7. Wang C, Wagner D, Bathias C. Study of fatigue crack mechanism on an Armco iron in the gigacycle fatigue by temperature recording and microstructural observations. In: Proc. Int. Cong. on Fracture. Beijing; 2013.
8. Study of thermal effects associated with crack propagation during very high cycle fatigue10.1016/j.actamat.2008.04.023 ↗
9. Fatigue crack initiation detection by an infrared thermography method10.1111/j.1460-2695.2009.01410.x ↗
10. Mughrabi H. The importance of fatigue crack initiation in Ultrahigh-Cycle Fatigue. In: VHCF 5 Conference, Berlin; 2011.
11. Propensities of crack interior initiation and early growth for very-high-cycle fatigue of high strength steels10.1016/j.ijfatigue.2013.02.023 ↗
12. Prediction of threshold value for FGA formation10.1016/j.msea.2011.05.070 ↗
13. The nature and the mechanism of crack initiation and early growth for very high cycle fatigue of metallic materials. An overview10.1016/j.tafmec.2017.05.002 ↗
14. Investigations on the fatigue crack propagation threshold in very high cycle fatigue
15. Hertzberg · 2012
16. Surface crack initiation mechanism for body centered cubic materials in the gigacycle domain10.1016/j.ijfatigue.2016.05.036 ↗
17. Fatigue crack nucleation and microstructure
18. Mughrabi · 1985
19. Cyclic slips irreversibilities and the evolution of fatigue damage10.1007/s11661-009-9839-8 ↗
20. Dislocation arrangement in the surface layer of α-iron grains during cyclic loading
21. Dissipative and microstructural effects associated with fatigue crack initiation on an Armco iron10.1016/j.ijfatigue.2013.02.009 ↗
22. The mechanism of fatigue failure of steels in the ultralong life regime of N>107 cycles
23. Review and prospects for current studies on very high cycle fatigue of metallic materials for machine structural use
24. Shiozawa · Int J Fatigue · 2006 · 28 · 152110.1016/j.ijfatigue.2005.08.015 ↗
25. High-cycle rotating bending fatigue property in very long-life regime of high-strength steels10.1046/j.1460-2695.2002.00575.x ↗
26. Microscopic and nanoscopic observations of metallurgical structures around inclusions at interior crack initiation site for a bearing steel in very high cycle fatigue10.1111/ffe.12344 ↗
27. Very high cycle fatigue behavior of a structural steel with and without induced surface defects10.1016/j.ijfatigue.2016.05.032 ↗
28. Philibert J. Vignes A. Brechet Y. Combrade P. Métallurgie, du minerai au matériau, Transformations structurales-Introduction aux changements de phase, Ed Masson, Paris; 1998. p. 513.
29. Damage effect on the fracture toughness of nodular cast iron : Part I. Damage characterization of plastic flow stress modeling10.1007/s11661-997-0182-7 ↗
30. Processing of nanostructured metals and alloys via plastic deformation10.1557/mrs2010.702 ↗
31. Surface nanocrystallization (SNC) of metallic materials – presentation of the concept behind a new approach
32. Nanostructured surface layer on metallic materials induced by surface mechanical attrition treatment10.1016/j.msea.2003.10.261 ↗
33. Multilayer modelling of stainless steel with a nanocrystallised superficial layer10.1016/j.msea.2011.12.085 ↗
34. Surface nanocrystallization of iron induced by ultrasonic shot peening10.1016/S0965-9773(99)00324-4 ↗
35. An investigation of surface nanocrystallization mechanism in Fe induced by surface mechanical attrition treatment10.1016/S1359-6454(02)00310-5 ↗
36. Fracture mechanical characterization of the initiation and crack growth of interior fatigue cracks
37. Philibert J. Vignes A. Brechet Y. Combrade P. Métallurgie, du minerai au matériau, Endommagement et rupture: généralités, Ed Masson, Paris; 1998. p. 850.
38. Effect of carburizing treatment on the “fish eye” crack growth for a low alloyed chromium steel in Very High Cycle Fatigue10.1016/j.msea.2012.09.025 ↗
39. On the mechanism of fatigue failure in the superlong life regime (N > 107 cycles), Part II: a fractographic investigation10.1046/j.1460-2695.2000.00343.x ↗
40. Fatigue crack propagation behavior derived from S-N data in very high cycle regime10.1046/j.1460-2695.2002.00547.x ↗