Abstract
A dual-phase alloy, Mo2Ni3Si/γ-Ni solid solution, consisting of Mo2Ni3Si primary dendrites and the interdendrtic γ/Mo2NisSi eutectic was fabricated by the lasmeltTM process. Room temperature wear properties of the alloy were evaluated under metallic sliding wear test conditions and the wear mechanisms were discussed. Due to the unique and strong covalent-metallic bonding of Mo2Ni3Si Laves phase and the toughening effect of γ, the alloy possessed excellent wear resistance. The wear mechanisms can be concluded as follows: the softer γ/Mo2Ni3Si eutectic was preferentially worn during wear process; due to the serious preferential abrasion, partial Mo2Ni3Si primary dendrites protruded from the worn surface were cracked and detached when losing the support of ductile matrix; in addition, the protruded Mo2Ni3Si primary dendrites prevent the matrix γ from continuous abrasion and control the total wear rate.
| Original language | English |
|---|---|
| Pages (from-to) | 722-726 |
| Number of pages | 5 |
| Journal | Jinshu Xuebao/Acta Metallurgica Sinica |
| Volume | 42 |
| Issue number | 7 |
| State | Published - Jul 2006 |
| Externally published | Yes |
Keywords
- Dual-phase alloy
- Intermetallics
- MoNiSi
- Wear