Investigation of the Microstructure and Strengthening Mechanisms of Ti-6Cu-8Nb-xCr₃C₂ Alloy through Vacuum Sintering Process

• Autorzy: Chang Shih-Hsien , Weng Chen-Yu , Huang Kuo-Tsung , Liang Cheng

Identyfikatory

DOI

10.24425/amm.2022.139671

• Języki publikacji: EN

Abstrakty

EN

This study mixes four different powders to produce Ti-6Cu-8Nb-xCr₃C₂ (x = 1, 3, and 5 mass%) alloys in three different proportions. The experimental results reveal that when 5 mass% Cr₃C₂ was added to the Ti-6Cu-8Nb alloys, the specimen possessed optimal mechanical properties after sintering at 1275°C for 1 h. The relative density reached 98.23%, hardness was enhanced to 67.8 HRA, and the transverse rupture strength (TRS) increased to 1821.2 MPa, respectively. The EBSD results show that the added Cr₃C₂ in situ decomposed into TiC and NbC during the sintering process, and the generated intermetallic compounds (Ti₂Cu) were evenly dispersed in the Ti matrix. Furthermore, the reduced Cr atom acts as a β-phase stabilizing element and solid-solution in the Ti matrix. Consequently, the main strengthening mechanisms of the Ti-6Cu-8Nb-xCr₃C₂ alloys include dispersion strengthening, solid-solution strengthening, and precipitation hardening.

Słowa kluczowe

EN

vacuum sintering; Ti-6Cu-8Nb-Cr3C2 alloy; hardness; transverse rupture strength; EBSD

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2022
• Tom: Vol. 67, iss. 3
• Strony: 815--825
• Opis fizyczny: Bibliogr. 25 poz., fot., rys., tab., wzory

Twórcy

autor

Chang Shih-Hsien

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

• https://orcid.org/0000-0002-8406-5631

autor

Weng Chen-Yu

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

• https://orcid.org/0000-0002-4190-065X

autor

Huang Kuo-Tsung

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

• https://orcid.org/0000-0002-1983-2777

autor

Liang Cheng

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

• https://orcid.org/0000-0002-5378-6890

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Uwagi

1. This research is supported by the Ministry of Science and Technology of the Republic of China under grant no. Most 109-2221-E-027-062-. 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.

2. Błąd w numeracji bibliografii.

3. Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).