| Autor: |
Xianjie Yuan, Xuanhui Qu, Haiqing Yin, Zhenwei Yan, Zhaojun Tan |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Materials, Vol 12, Iss 18, p 3005 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
1996-1944 |
| DOI: |
10.3390/ma12183005 |
| Popis: |
In this research, the effects of the compaction velocity on the sinterability of the Al−Fe−Cr−Ti powder metallurgy (PM) alloy by high velocity compaction were investigated. The Al−Fe−Cr−Ti alloy powder was compacted with different velocities by high velocity compaction and then sintered under a flow of high pure (99.999 wt%) nitrogen gas. Results indicated that both the sintered density and mechanical properties increased with increasing compaction velocity. By increasing the compaction velocity, the shrinkage of the sintered samples decreased. A maximum sintered density of 2.85 gcm−3 (relative density is 98%) was obtained when the compaction velocity was 9.4 ms−1. The radial and axial shrinkage were controlled to less than 1% at a compaction velocity of 9.4 ms−1. At a compaction velocity of 9.4 ms−1, sintered compacts with an ultimate tensile strength of 222 MPa and a yield strength of 160 MPa were achieved. The maximum elongation was observed to be 2.6%. The enhanced tensile properties of the Al−Fe−Cr−Ti alloy were mainly due to particle boundary strengthening. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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