中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 18 No. 2 April 2008 |
（1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China2. Beijing Institute of Aeronautical Materials, Beijing 100095, China）
Abstract:By means of induction melting technology, Ti-6Al-4V alloy staging casting was made with the same rotation velocity and centrifugal radius. The effects of casting modulus on the grain size, the thickness of lamellar α+β phase, and the Vickers hardness, as well as the relationships between Vickers hardness, grain size and thickness of lamellar α+β phase were investigated. The results show that the greater the modulus, the larger the grain size and the thickness of lamellar α+β phase, and the less the Vickers hardness. The relationship between Vickers hardness and grain size meets the Hall-Petch equation: Hv=353.45+74.17 . The relationship between the Vickers hardness and the thickness of lamellar α+β phase is expressed as Hv=
Key words: Ti-6Al-4V alloy; centrifugal field; modulus; microstructure; hardness
