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In-situ Studies of Deformation Behavior and Damage Evolution in High Temperature Titanium Alloy IMI 834

Biallas, Gerhard and Maier, Hans Jürgen (2004) In-situ Studies of Deformation Behavior and Damage Evolution in High Temperature Titanium Alloy IMI 834. In: Ti-2003 Science and Technology, III, pp. 1949-1956. Wiley-VCH, Weinheim. Ti-2003, 10th World Conference on Titanium, 2003-13-07 - 2003-18-07, Hamburg.

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Abstract

The low-cycle fatigue behavior of near-α titanium alloy IMI 834 was studied in-situ at a temperature of 400 °C. The in-situ fatigue tests were conducted in an environmental scanning electron microscope under both high vacuum and 20 Torr of water vapor. In both environments, slip bands were observed to originate within the primary α grains rapidly. Slip bands were more numerous and more uniformly distributed when tests were conducted in vacuum. Crack nucleation also occurred along the slip bands but cracks appeared distinctly earlier in water vapor. The humid atmosphere presumably both eased crack initiation and accelerated crack growth due to environmental attack. Both mechanisms provide a rational for the pronounced decrease in cyclic life observed in water vapor compared to cycling in vacuum.

Document Type:Conference or Workshop Item (Speech)
Title:In-situ Studies of Deformation Behavior and Damage Evolution in High Temperature Titanium Alloy IMI 834
Authors:
AuthorsInstitution or Email of Authors
Biallas, GerhardUNSPECIFIED
Maier, Hans JürgenUniversität Paderborn
Date:2004
Journal or Publication Title:Ti-2003 Science and Technology
Volume:III
Page Range:pp. 1949-1956
Editors:
EditorsEmail
Lütjering, G.UNSPECIFIED
Albrecht, J.UNSPECIFIED
Publisher:Wiley-VCH, Weinheim
Status:Published
Keywords:titanium alloy IMI834, in-situ fatigue, scanning electron microscopy, environmental degradation, damage mechanisms
Event Title:Ti-2003, 10th World Conference on Titanium
Event Location:Hamburg
Event Type:international Conference
Event Dates:2003-13-07 - 2003-18-07
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Mechanical Testing of Materials
Deposited By: Dr.-Ing. Gerhard Biallas
Deposited On:27 Jan 2006
Last Modified:27 Apr 2009 04:55

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