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Effect of environment on notch fatigue initiation resistance in CMSX4

Reed, P.A.S. and Miller, M.D. (2005) Effect of environment on notch fatigue initiation resistance in CMSX4 TMS Letters, 2, (1), pp. 27-28.

Record type: Article


Crack initiation at high temperatures has been studied in CMSX4 in both air and vacuum environments, to elucidate the effect of oxidation on the notch fatigue initiation process. In air, crack initiation occurred at sub-surface interdendritic pores in all cases. The sub-surface crack grows initially under vacuum conditions, before breaking out to the top surface. Lifetime is then critically dependent on initiating pore size and distance from the notch root surface. In vacuum conditions, crack initiation has been observed more consistently from surface or closeto-surface pores - indicating that surface oxidation is infilling/"healing" surface pores or providing significant local stress transfer to shift initiation to sub-surface pores

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Published date: 2005
Additional Information: This issue comprises previously unpublished research from the 2005 TMS Annual Meeting, which was held 13-17 Feb, San Francisco, USA.


Local EPrints ID: 23320
PURE UUID: 38ea963c-a644-42a0-8fc7-f9342791b2ea
ORCID for P.A.S. Reed: ORCID iD

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Date deposited: 12 Mar 2007
Last modified: 17 Jul 2017 16:17

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Author: P.A.S. Reed ORCID iD
Author: M.D. Miller

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