HfCo 2 Laves Phase Intermetallics - Part II: Elastic and Mechanical Properties as a Function of Composition
作者： Katherine C Chen , Fuming Chu , Paul G Kotula , Dan Thoma
DOI: 10.1016/S0966-9795(01)00067-X
关键词: Shear modulus 、 Laves phase 、 Toughness 、 Crystallography 、 Resonant ultrasound spectroscopy 、 Indentation hardness 、 Debye model 、 Materials science 、 Bulk modulus 、 Composite material 、 Deformation (engineering)
摘要: Abstract In efforts to establish and understand structure–property relationships in Laves phase intermetallics, elastic mechanical properties are studied as a function of composition the C15 HfCo2 system. Elastic constants Debye temperatures determined by resonant ultrasound spectroscopy (RUS) at room temperature. A maximum near stoichiometric is revealed with Young's modulus, bulk Poisson's ratio. addition, slight drop shear modulus found Co-rich compositions, temperature increases Co-content. Room Vickers indentation performed assess microhardness fracture toughness alloys. hardness occurs composition, which contrary behavior displayed most other classes intermetallics. Slight improvements compositions phase. Compositional trends attributed defect structures, analyzed respect bonding structure ease synchroshear deformation process proceeds. Toughening strategies methodologies then developed based upon these results.
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