J Mater Sci Technol ›› 1996, Vol. 12 ›› Issue (2): 100-104.

• Articles • Previous Articles     Next Articles

Microstructure Evolution of Rapidly Solidified Ti_3Al-2Nb Alloy

Rui XU; Yuyou CUI; Dong LI and Zhuangqi HU (State Key Lab. of RSA, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China)Daming XU and Qingchun LI (Dept. of Materials Science and Technology, Harbin Institute of Technology, Harb   

  • Received:1996-03-28 Revised:1996-03-28 Online:1996-03-28 Published:2009-10-10

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Abstract: It has been found from the analysis of X-ray diffraction and the observation of TEM that the metastable ordered orthorhombic martensite phase in the rapidly solidified Ti3Al-2Nb alloy transforms to various phases at different aging temperatures. When the alloy aged at temperature of 500℃ for 20 min, the phase decomposition into B2 and O phases is related to the stressin the alloy. When the aged temperature above 600℃, the phase transforms to α2 phase by both shearing and chemical ordering

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