Effect of Solution Heat Treatment on the Microstructure and Hardness of theTi-48Al-2Cr-2Nb Alloy Prepared by Electron Beam Smelting

Autor:	Xiaogang You, Pengting Li, Huiping Liu, Yilin Wang, Yi Tan
Rok vydání:	2021
Předmět:	Materials science Mechanical Engineering Alloy Metallurgy engineering.material Microstructure Indentation hardness Grain size Mechanics of Materials Impurity Smelting engineering General Materials Science Lamellar structure Ingot
Zdroj:	Journal of Materials Engineering and Performance. 31:1387-1396
ISSN:	1544-1024 1059-9495
Popis:	A Ti-48Al-2Cr-2Nb alloy was prepared by electron beam smelting. The effect of solution parameters on the microstructures, constituent phases and hardness was studied. The results show that impurities in the alloy could be significantly removed after electron beam smelting. The content of O and N in the ingot after smelting is about 93.25 and 25.75 ppmw, respectively. The average grain size of the ingot is 250 μm, and the lamellar spacing varies from 40 to 200 nm. As the solution temperature increases, the microstructure is coarsened obviously, accompanied with the increase in lamellar spacing. The lamellar spacing, the grain size and the microhardness of the alloy increase gradually as the solution time increases. When the alloy is solution treated at 1320 °C for 30 min, a uniform microstructure can be acquired, whose grain size is about 500 μm with an average lamellar spacing of 200 nm. The microhardness of the alloy after optimized heat treatment is 400HV.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0fd8f809f0b94c6affcb15c7486ad855 https://doi.org/10.1007/s11665-021-06231-z Zobrazit plný text záznamu Full text from SpringerLink