Fracture and Structural Integrity e-ISSN 1971-8993 Open access
Miscellanea Vol. 10, No. 35 (2016)

Experimental investigation of crack initiation and propagation in high- and gigacycle fatigue in titanium alloys by study of morphology of fracture

Author and affiliation details
  • M.V. Bannikov Corresponding author mbannikov@icmm.ru
  • O. B. Naimark
  • V.A. Oborin
DOI
10.3221/IGF-ESIS.35.06
Pages
pages 51-56
Published
Published inVol. 10, No. 35 (2016)Go to the issue

Abstract

Fatigue (high- and gigacycle) crack initiation and its propagation in titanium alloys with coarse and fine grain structure are studied by fractography analysis of fracture surface. Fractured specimens were analyzed by interferometer microscope and electronic microscope to improve methods of monitoring of damage accumulation during fatigue test and verify the models for fatigue crack kinetics. Fatigue strength was estimated for high cycle fatigue (HCF) regime using the Luong method [1] by “in-situ” infrared scanning of the sample surface for the step-wise loading history for different grain size metals. Fine grain alloys demonstrated higher fatigue resistance for both HCF and gigacycle fatigue regimes. Fracture surface analysis for cylindrical samples was carried out using optical and electronic microscopy method. High resolution profilometry (interferometerprofiler New View 5010) data of fracture surface roughness allowed us to estimate scale invariance (the Hurst exponent) and to establish the existence of two characteristic areas of damage localization (different values of the Hurst exponent). Area 1 with diameter ~300 ?m has the pronounced roughness and is associated with damage localization hotspot. Area 2 shows less amplitude roughness, occupies the rest fracture surface and considered as the trace of the fatigue crack path corresponding to the Paris kinetics.

Keywords

Article history

  1. ReceivedUntil the next stage: 0 days
  2. AcceptedUntil the next stage: 5 days
  3. Published

How to cite

APA

Bannikov, M., Naimark, O. B., & Oborin, V. (2015). Experimental investigation of crack initiation and propagation in high- and gigacycle fatigue in titanium alloys by study of morphology of fracture. Fracture and Structural Integrity, 10(35), pages 51–56. https://doi.org/10.3221/IGF-ESIS.35.06

IEEE

M. Bannikov, O. B. Naimark, and V. Oborin, “Experimental investigation of crack initiation and propagation in high- and gigacycle fatigue in titanium alloys by study of morphology of fracture,” Fracture and Structural Integrity, vol. 10, no. 35, pp. pages 51–56, 2015, doi: 10.3221/IGF-ESIS.35.06.

MLA

Bannikov, M.V., et al. “Experimental investigation of crack initiation and propagation in high- and gigacycle fatigue in titanium alloys by study of morphology of fracture.” Fracture and Structural Integrity, vol. 10, no. 35, 2015, pp. pages 51–56. https://doi.org/10.3221/IGF-ESIS.35.06.

Chicago

Bannikov, M.V., O. B. Naimark, and V.A. Oborin. 2015. “Experimental investigation of crack initiation and propagation in high- and gigacycle fatigue in titanium alloys by study of morphology of fracture.” Fracture and Structural Integrity 10 (35): pages 51–56. https://doi.org/10.3221/IGF-ESIS.35.06.

Harvard

Bannikov, M., Naimark, O.B. and Oborin, V. (2015) ‘Experimental investigation of crack initiation and propagation in high- and gigacycle fatigue in titanium alloys by study of morphology of fracture’, Fracture and Structural Integrity, 10(35), pp. pages 51–56. doi: 10.3221/IGF-ESIS.35.06.

Vancouver

Bannikov M, Naimark OB, Oborin V. Experimental investigation of crack initiation and propagation in high- and gigacycle fatigue in titanium alloys by study of morphology of fracture. Fracture and Structural Integrity. 2015;10(35):pages 51-56. doi:10.3221/IGF-ESIS.35.06

BibTeX

@article{bannikov2015, author = {Bannikov, M.V. and Naimark, O. B. and Oborin, V.A.}, title = {Experimental investigation of crack initiation and propagation in high- and gigacycle fatigue in titanium alloys by study of morphology of fracture}, journal = {Fracture and Structural Integrity}, year = {2015}, volume = {10}, number = {35}, pages = {pages 51--56}, doi = {10.3221/IGF-ESIS.35.06}, url = {https://doi.org/10.3221/IGF-ESIS.35.06}, issn = {1971-8993} }

RIS

TY - JOUR AU - Bannikov, M.V. AU - Naimark, O. B. AU - Oborin, V.A. TI - Experimental investigation of crack initiation and propagation in high- and gigacycle fatigue in titanium alloys by study of morphology of fracture JO - Fracture and Structural Integrity T2 - Fracture and Structural Integrity PY - 2015 DA - 2015/12/29 VL - 10 IS - 35 SP - pages 51 EP - 56 DO - 10.3221/IGF-ESIS.35.06 UR - https://doi.org/10.3221/IGF-ESIS.35.06 SN - 1971-8993 ER -

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