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Title: Thermal Fatigue of Shot Peened or Hard Turned Hot-Work Steel AISI H11
Author: KrauB, Scholtes
Source: Conf Proc: ICSP-8 Sept. 16-20, 2002 Garmisch-Partenkirchen, Germany
Publication year 2002
Document number: 2002042
Number of pages: 7
Abstract:
Authors
Martin KrauB, Berthold Scholtes, Institute of Materials Technology, University of Kassel, Kassel, Germany
Introduction
The lifetime of hot-work tools is often limited by the development of thermal fatigue cracks, which occur as a consequence of alternating temperatures connected with thermal
stresses [1,2]. It is well known, that in the case of mechanically loaded components, strength or lifetime can be enhanced by appropriate mechanical surface treatments. This
is mostly attributed to near surface residual stress distributions and strain hardening effects [3 - 5]. Although in the case of combined thermo-mechanical loading, near
surface microstructures are expected to be less stable compared to isothermal conditions at moderate temperatures, the question arises, whether such beneficial effects can
also be realized in the case of thermal fatigue. In what follows, characteristic results of such investigations are presented.
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