Effects of the Microstructure and Strengthening Mechanisms of Mo₂C Powders Being Added to Ti-8Nb-4Co Alloy Via the Vacuum Sintering Process

• Autorzy: Chang, Shih-Hsien , Liao, Kun Jie , Huang, Kuo-Tsung , Liang, Cheng
• Języki publikacji: EN

Abstrakty

EN

This study utilizes Ti-8Nb-4Co alloys added to different proportions of Mo₂C powders (1, 3, and 5 mass%) by the vacuum sintering process of powder metallurgy and simultaneously vacuum sinters the alloys at 1240, 1270, 1300, and 1330°C for 1 h, respectively. The experimental results indicate that when 3 mass% Mo₂C powders were added to the Ti-8Nb-4Co alloys, the specimens possessed the optimal mechanical properties after sintering at 1300°C for 1 h. The relative density was 98.02%, and the hardness and TRS were enhanced to 69.6 HRA and 1816.7 MPa, respectively. In addition, the microstructure of vacuum sintered Ti-8Nb-4Co-3Mo₂C alloys has both α and β-phase structures, as well as TiC precipitates. EBSD results confirm that the Mo₂C in situ produced TiC during the sintering process and was uniformly dispersed in the grain boundary. Moreover, the reduced molybdenum atom acted as a β-phase stabilizing element and solid-solution in the titanium matrix.

Słowa kluczowe

EN

Ti-8Nb-4Co alloy; Mo2C powders; vacuum sintering; TRS; EBSD

• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2023
• Tom: Vol. 68, iss. 4
• Strony: 1255--1265
• Opis fizyczny: Bibliogr. 24 poz., fot., rys., tab.

Twórcy

autor

Chang, Shih-Hsien

• National Taipei University of Technology, Department of Materials and Mineral Resources Engineering, Taipei 10608, Taiwan, ROC,

autor

Liao, Kun Jie

• National Taipei University of Technology, Department of Materials and Mineral Resources Engineering, Taipei 10608, Taiwan, ROC

autor

Huang, Kuo-Tsung

• National Kangshan Agricultural Industrial Senior High School, Department of Auto-Mechanics, Kaohsiung 82049, Taiwan, ROC

autor

Liang, Cheng

• National Taipei University of Technology, Department of Materials and Mineral Resources Engineering, Taipei 10608, Taiwan, ROC

Bibliografia

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Uwagi

This research is supported by the National Science and Technology Council
of the Republic of China under Grant No. MOST110-2221-E-027-014-.
The authors would like to express their appreciations for ASSAB STEELS
TaiwaN Co., lTD. Furthermore, thanks to prof. h.C. lin and Mr. C.Y.
Kao of Instrumentation Center, National Taiwan University for EPMA and
EBSD experiments.

Identyfikatory

DOI

10.24425/amm.2023.146190