High temperature fatigue characteristics of P/M and hot-forged W-Re and TZM for X-ray target of CT scanner

Harimon, Mohd Azhar and Miyashita, Yukio and Otsuka, Yuichi and Mutoh, Yoshiharu and Yamamoto, Shinichi (2018) High temperature fatigue characteristics of P/M and hot-forged W-Re and TZM for X-ray target of CT scanner. Materials & Design, 137. pp. 335-344. ISSN 0261-3069

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Abstract

The fatigue strengths at 1000 °C of layered W-Re/TZM, bulk W-Re and bulk TZM for x-ray target materials were successfully evaluated under load-controlled four-point bending by introducing a fatigue failure criterion as twotimes increase of initial compliance. The obtained fatigue strengths at 1000 °C for layered W-Re/TZM and bulk WRe were similar and 280 MPa and 290 MPa at 106 cycles, respectively, while that of bulk TZM was 200 MPa. During fatigue loading at 1000 °C, dominant fatigue damage would be multiple intergranular crack nucleation and propagation, which would induce the increase of compliance. The reasonability of the fatigue failure criterion was confirmed by the fatigue process observations and the results of room temperature fatigue tests of the specimens tested at 1000 °C up to the cycles corresponding to the fatigue failure criterion.

Item Type:	Article
Uncontrolled Keywords:	Fatigue strength; High temperature; Fatigue damage; Microstructureproperty relationship; Refractory materials
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions:	Faculty of Mechanical and Manufacturing Engineering > Department of Mechanical Engineering
Depositing User:	UiTM Student Praktikal
Date Deposited:	07 Dec 2021 09:08
Last Modified:	07 Dec 2021 09:08
URI:	http://eprints.uthm.edu.my/id/eprint/4621

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