On Improving the Fracture Toughness of a Niai-Based Alloy by Mechanical Alloying
Autor: | D. A. Koss, J. Kostrubanic, M. Nathal, Ivan E. Locci |
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Rok vydání: | 1990 |
Předmět: | |
Zdroj: | MRS Proceedings. 213 |
ISSN: | 1946-4274 0272-9172 |
DOI: | 10.1557/proc-213-679 |
Popis: | Mechanical alloying (MA) has been used to process the NiAl-based alloy Ni-35Al-2OFe such that a fine-grain (∼2 μm) microstructure is obtained through the addition of 2 v/o Y2O3 particles. When compared to a conventionally processed, coarse-grained (∼;28 μm) Ni-35–20 alloy without the Y2O3 particles, the MA alloy exhibits two to three times higher fracture toughness values, despite a 50% increase in yield strength. Room temperature KQ values as high as 34 √Pa m are observed accompanied by a yield strength in excess of 1100 MPa. Fractography confirms a change in fracture characteristics of the fine-grained MA alloy. |
Databáze: | OpenAIRE |
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