Microstructure and strength of weldment in Pt20Rh alloys dispersion-strengthened by ZrO2 particles: Paper

Faping Hu, Ziyang Wang, Tianbo Yu, Zonglun Yang, Guobing Wei, Xuan Luo, Niels Hansen, Xiaoxu Huang, Weidong Xie*

*Corresponding author for this work

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Abstract

A series of Pt20Rh alloys dispersion-strengthened by different volume fractions of ZrO2 particles have been prepared by internal oxidation of Pt20Rh powder followed by consolidation and hot forging. The alloys were cold rolled to sheets, followed by annealing. The effects of welding on the microstructure and mechanical properties were also investigated. The microstructure of the rolled sheets showed a lamellar structure and the yield stress was significantly increased with increasing volume fraction of dispersion particles. After welding, the yield stress at room temperature was almost unchanged, although a small decrease was observed at 1000 °C. However, the work hardening capacity and ultimate tensile stress were significantly reduced in the welded sample due to grain coarsening and to increased pore density in the fusion zone.
Original languageEnglish
Article number012035
JournalI O P Conference Series: Materials Science and Engineering
Volume580
Issue number1
Number of pages6
ISSN1757-8981
DOIs
Publication statusPublished - 2019
Event40th Risø International Symposium on Material Science: Metal Microstructures in 2D, 3D, and 4D - Roskilde, Denmark
Duration: 2 Sep 20196 Sep 2019

Conference

Conference40th Risø International Symposium on Material Science: Metal Microstructures in 2D, 3D, and 4D
CountryDenmark
CityRoskilde
Period02/09/201906/09/2019

Bibliographical note

GA no. 788567

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