Finite-Element Modeling of Titanium Powder Densification

作者：Ye Bing^*; Matsen Marc R; Dunand David C

来源：Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 2012, 43A(1): 381-390.

DOI：10.1007/s11661-011-0839-0

A powder-level, finite-element model is created to describe densification, as a function of applied stress during uniaxial hot pressing, of CP-Ti and Ti-6Al-4V powders with spherical or spheroidal shapes for various packing geometries. Two cases are considered: (1) isothermal densification (in the alpha- or beta-fields of CP-Ti and in the beta-field of Ti-6Al-4V) where power-law creep dominates and (2) thermal cycling densification (across the alpha/beta-phase transformation of Ti-6Al-4V) where transformation mismatch plasticity controls deformation at low stresses. Reasonable agreement is achieved between numerical results and previously published experimental measurements and continuum modeling predictions.

• 出版日期2012-1
• 单位西北大学