| XUE Xian-da,MA Yue-hui,LI Yan.Comparative Study on Friction and Wear Properties of Ni50Ti30Zr20 and Ni50Ti50 Alloys[J],48(12):204-210 |
| Comparative Study on Friction and Wear Properties of Ni50Ti30Zr20 and Ni50Ti50 Alloys |
| Received:June 15, 2019 Revised:December 20, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.12.024 |
| KeyWord:Ni50Ti30Zr20 shape memory alloy phase composition micro-hardness wear resistance wear mechanism |
| Author | Institution |
| XUE Xian-da |
1.School of Materials Science and Engineering, Beihang University, Beijing , China |
| MA Yue-hui |
2.Lanzhou Seemine SMA Co. Ltd, Lanzhou , China |
| LI Yan |
1.School of Materials Science and Engineering, Beihang University, Beijing , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to investigate the friction and wear properties of Ni50Ti30Zr20 alloy with Ni50Ti50 alloy as the reference object. Ni50Ti30Zr20 alloy was smelted in the non-consumable arc-melting furnace, and the experimental samples were cut from the ingot directly. With Ni50Ti50 alloy as the contrast sample, EDS, XRD, micro-hardness test, friction and wear test, SEM and three-dimensional morphology test were taken to evaluate the composition, phase composition, micro-hardness, wear resistance, wear morphology and wear volume of Ni50Ti30Zr20 alloy and Ni50Ti50 alloy, respectively. XRD results showed that Ni50Ti30Zr20 alloy was composed of B19’ martensite phase and Ni50Ti50 alloy was composed of B2 austenite phase. The results of micro-hardness test showed that the micro-hardness of Ni50Ti30Zr20 and Ni50Ti50 alloy was (381.64±7.32)HV and (230.58± 6.74)HV, respectively. From SEM image, the wear morphologies of both alloys were composed of stripping layers. The content of O and Si elements increased significantly after the wear experiment by energy spectrum measurement. According to the friction coefficient curve and the three-dimensional morphology of wear marks, the friction coefficient and wear volume of Ni50Ti30Zr20 alloy were smaller than that of Ni50Ti50 alloy under the same load. When the load was 20 N, the wear volume of Ni50Ti30Zr20 alloy was 0.078 mm3, and that of Ni50Ti50 alloy was 0.084 mm3. The wear mechanism of Ni50Ti30Zr20 and Ni50Ti50 alloys is fatigue wear. During the process of wear test, both alloys can be oxidized, and the grinding ball is partially peeled into the grinding mark. The wear resistance of Ni50Ti30Zr20 alloy is better than that of Ni50Ti50 alloy. |
| Close |
|
|
|