The Kinetics of Phase Transformations During Continuous Cooling of Ti6Al4V Alloy from the Diphase α + β Range

Archives of Metallurgy and Materials

R. Dąbrowski¹ 

[1] Faculty of Metals Engineering and Industrial Computer Science, Agh University of Science and Technology, 30-059 Krakow, 30 Mickiewicza Av., Poland;

关键词: Keywords: phase transformations;    microstructure;    hardness;    dilatometric curve;    CCT diagram;   

DOI  :  10.2478/v10172-011-0025-9

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The paper reports on a study of the kinetics of phase transformations during continuous cooling of the diphase Ti6Al4V titanium alloy from the diphase α + β range (950°C). It has been found that within the whole range of applied cooling rates a diffusional β → α transformation occurred. Metallographic observations of the alloy's microstructure gave evidence of changes in the α phase morphology. Upon cooling at between 7.1 and 0.9°C/s the α phase precipitates show lamellar character (Widmannstätten structure), while at the slowest rates (0.23÷0.011°C/s) the α phase precipitates in a form of grains. Besides microstructural changes, dilatometric effects were also observed which corroborates occurrence of phase transformations in the alloy.

【 授权许可】

Unknown