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Influence of Environment on Fatigue Mechanisms in High-Temperature Titanium Alloy IMI834

Biallas, Gerhard and Essert, Mark and Maier, Hans Jürgen (2005) Influence of Environment on Fatigue Mechanisms in High-Temperature Titanium Alloy IMI834. International Journal of Fatigue, 27 (10-12), pp. 1485-1493.

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We report on in-situ fatigue tests performed in an environmental scanning electron microscope on high-temperature titanium alloy IMI 834 in the range from room temperature to 600 °C both in vacuum and water vapor environments. At low and intermediate temperatures (~ 400 °C) cracks were found to initiate at slip bands independent of the actual environment. However, crack initiation in water vapor occurred at a much lower number of cycles. At 600 °C, the environmental effect became even more pronounced as cracks could easily form in an oxygen-enriched brittle subsurface layer. Moreover, fatigue life at this temperature was found to decrease distinctly in the case of cycling in pure water vapor as compared to loading in ambient air.

Item URL in elib:https://elib.dlr.de/21548/
Document Type:Article
Title:Influence of Environment on Fatigue Mechanisms in High-Temperature Titanium Alloy IMI834
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Essert, MarkUniversität PaderbornUNSPECIFIEDUNSPECIFIED
Maier, Hans JürgenUniversität PaderbornUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:International Journal of Fatigue
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1485-1493
Keywords:titanium alloy IMI834, in-situ fatigue, scanning electron microscopy, environmental degradation, damage mechanisms
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Mechanical Testing of Materials
Deposited By: Biallas, Dr.-Ing. Gerhard
Deposited On:27 Jan 2006
Last Modified:27 Apr 2009 04:55

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