TY - JOUR
T1 - INVESTIGATION OF THE MICROSTRUCTURE AND STRENGTHENING MECHANISMS OF Ti-6Cu-8Nb-xCr3C2 ALLOY THROUGH VACUUM SINTERING PROCESS
AU - Chang, Shih Hsien
AU - Weng, Chen Yu
AU - Huang, Kuo Tsung
AU - Liang, Cheng
N1 - Publisher Copyright:
© 2022. The Author(s).
PY - 2022
Y1 - 2022
N2 - 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.
AB - 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.
KW - EBSD
KW - Ti-6Cu-8Nb-CrC alloy
KW - hardness
KW - transverse rupture strength
KW - vacuum sintering
UR - https://www.scopus.com/pages/publications/85130450699
U2 - 10.24425/amm.2022.139671
DO - 10.24425/amm.2022.139671
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AN - SCOPUS:85130450699
SN - 1733-3490
VL - 67
SP - 815
EP - 825
JO - Archives of Metallurgy and Materials
JF - Archives of Metallurgy and Materials
IS - 3
ER -