The effect of HIPping pressure on phase transformations in Ti-5Al-5Mo-5V-3Cr

作者：Cao Lingfei; Wu Xiaodong; Zhu Suming; Mei Junfa; Wu Xinhua; Bettles Colleen^*

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2014, 598: 207-216.

DOI：10.1016/j.msea.2014.01.013

• Ti-5Al-5Mo-5V-3Cr
• Phase transformation
• Hot-isostatic-pressing
• Image analysis
• X-ray diffraction

Hot-isostatic-pressing (Hipping) of pre-alloyed powders is an effective, highly material-efficient, novel manufacturing technique for the preparation of near-to-net shape components. However, the effect of pressure during HIPping on the beta -> alpha a transformation inherent in titanium alloys is not well understood. This effect on phase transformation was investigated on both powder-based and bulk-based Ti-5Al-5Mo-5V-3Cr (Ti-5553). Microstructure characterisation and phase relationships were investigated using scanning electron microscopy and X-ray diffraction methods. The results show that the modest pressure applied in HIPping (100-200 MPa) can influence the alpha-beta phase transformation in Ti-5553. Possible mechanisms related to these changes in phase transformation and microstructure are discussed.

• 出版日期2014-3-26