Study of Deformation Mechanisms in an α-β annealed Ti-6Al-4V Titanium Alloy on Charpy Specimens
Crack propagation mechanisms have been investigated,on a Ti-6A1-4V α-β titanium alloy, through Charpy tests. Different Charpy specimen orientations were tested and results showed a dependence of the impact toughness regarding to this orientation. Evidence of a strong crystallograph-ic texture has been revealed thanks to X-ray Diffraction. This texture is attributed to the rolling process to achieve the 12 mm thick Ti-6A1-4V plate. Electron BackScattering Diffraction (EBSD) analyses underlined a pile-up of macrozones in which the texture is very intense. Cristal orientation in these macrozones seems to influence strongly the impact toughness as they can act either as reinforcements or as weak points for the material like in composite structures. Depending on the solicitation direction of these macrozones,prismatic slip or twinning could be identified. Twining of the α phase can result from the high strain occurring during the test and from the sharp texture of the material.
Impact toughness microtexture twinning EBSD Ti-6Al-4 V
Christophe Buirette Julitte Huez Nathalie Gey Eric Andrieu Gael Khelifati Jerome Delfosse
CIRIMATENSIACET Universite de Toulouse,4 alike Emile Monso BP 44362 31030 Toulouse cedex 4 ,France LEM3 ,CNRS,Universite Paul Verlaine Metz, 57045 Metz Cedex 01 ,France Airbus Operation SAS, 316,route de Bayonne, 31060 Toulouse Cedex 9 ,France EADS Innovation works ,12 rue pasteur BP 76 ,92152 Suresnes Cedex,France
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1045-1048
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）