The Sclerometrical, Mechanical, and Wear Behavior of Mg-Y-Nd Magnesium Alloy after Deep Cryogenic Treatment Combined with Heat Treatment
| Autor: | Izabela Matuła, Adrian Barylski, Marian Kupka, Grzegorz Dercz, Sławomir Kaptacz, Krzysztof Aniołek |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
wear
Materials science Alloy microstructure 02 engineering and technology engineering.material Indentation hardness lcsh:Technology Article Precipitation hardening 0203 mechanical engineering General Materials Science X‐ray diffraction Magnesium alloy lcsh:Microscopy lcsh:QC120-168.85 lcsh:QH201-278.5 sclerometrical properties lcsh:T Abrasive Metallurgy Tribology 021001 nanoscience & nanotechnology Microstructure X-ray diffraction 020303 mechanical engineering & transports Mg-Y-Nd magnesium alloy lcsh:TA1-2040 Mg‐Y‐Nd magnesium alloy engineering microhardness Cryogenic treatment deep cryogenic treatment (DCT) lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 |
| Zdroj: | Materials, Vol 14, Iss 1218, p 1218 (2021) Materials Volume 14 Issue 5 |
| ISSN: | 1996-1944 |
| Popis: | The paper investigates changes in the structure, microhardness, and sclerometrical and tribological properties of a Mg-Y-Nd alloy under the influence of deep cryogenic treatment (DCT) in combination with heat treatment. The solution treatment was carried out at 545 °C for 8 h, aging was carried out at 250 °C for 24 h, and the deep cryogenic treatment applied at different treatment stages was performed at −196 °C. Tests showed a significant increase in the number of β-phase precipitates identified as Mg46.1Y6.25RE3.45 in the alloy subjected to DCT after solution treatment followed by aging. In addition, an approximately 20% reduction of the grain size was observed. Changes in the structure in the precipitation process strengthened the alloy and resulted in an increase of its hardness. At the same time, sclerometric tests allowed the micromechanism of wear and the coefficient of resistance to abrasive wear to be determined. Tribological tests showed a three-fold reduction in the volumetric wear and a considerable reduction of the friction coefficient, with the main mechanism observed during friction being abrasive wear. The most favorable properties of the alloy were obtained after precipitation hardening combined with DCT, resulting in a large increase in resistance to abrasive wear. Additionally, the formation of deep scratches in the examined material was reduced. The introduction of sub-zero treatment reduces the precipitation hardening time, and the results obtained indicate that the service life of the Mg-Y-Nd alloy can be extended. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|