Abstract
Thermal cracks in die-casting are often caused by thermal fatigue loading, surface stresses, low material strength and surface irregularities. During the process cycle, alternate heating and cooling leads to thermal fatigue. Mechanical and thermal stress fluctuations initiate fine cracks on the cavity surface that grow larger and ultimately lead to failure of the die. Hardness or surface heat treatment can extend the die life time. The aim of this work is to study the thermal fatigue damage of AISI H13 tool steels that underwent different heat treatments. The results prove that the thermal fatigue resistance is closely related to the initial hardness. In fact, thermal fatigue tests prove that increases in the hardness of the steel lead to decreases in the crack growth rate. However, it seems that the heat treatment does any not major effect on the crack initiation period of thermal fatigue cracks.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
