The Microalloying Effect of Ce on the Mechanical Properties of Medium Entropy Bulk Metallic Glass Composites
| Autor: | Yanchun Zhao, Jiang Jianlong, Zhao Pengbiao, Kou Shengzhong, Yang Zhuang, Wensheng Li, Mao Xuejing |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Phase transition Amorphous metal Induction heating Materials science General Chemical Engineering bulk metallic glass composites 02 engineering and technology Plasticity 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Inorganic Chemistry mechanical property Flexural strength Martensite martensitic phase transformation 0103 physical sciences lcsh:QD901-999 General Materials Science lcsh:Crystallography Composite material 0210 nano-technology Supercooling |
| Zdroj: | Crystals Volume 9 Issue 9 Crystals, Vol 9, Iss 9, p 483 (2019) |
| ISSN: | 2073-4352 |
| DOI: | 10.3390/cryst9090483 |
| Popis: | Novel ultra-strong medium entropy bulk metallic glasses composites (BMGCs) Fe65.4&minus xCexMn14.3Si9.4Cr10C0.9 and Ti40&minus xCexNi40Cu20 (x = 0, 1.0), through the martensite transformation induced plasticity (TRIP effect) to enhance both the ductility and work-hardening capability, were fabricated using magnetic levitation melting and copper mold suction via high frequency induction heating. Furthermore, the Ce microalloying effects on microstructure and mechanical behaviors were studied. The Fe-based BMGCs consisted of face-centered cubic (fcc) &gamma Fe and body-centered cubic (bcc) &alpha Fe phase, as well as Ti-based BMGCs containing supercooled B2-Ti (Ni, Cu) and a thermally induced martensite phase B19&rsquo Ti (Ni, Cu). As loading, the TRIP BMGCs exhibited work-hardening behavior, a high fracture strength, and large plasticity, which was attributed to the stress-induced transformation of &epsilon Fe martensite and B19&rsquo Ti (Ni, Cu) martensite. Ce addition further improved the strengthening and toughening effects of TRIP BMGCs. Adding elemental Ce enhanced the mixing entropy &Delta Smix and atomic size difference &delta while reducing the mixing enthalpy &Delta Hmix, thus improving the glass forming ability and delaying the phase transition process, and hence prolonging the work-hardening period before fracturing. The fracture strength &sigma f and plastic stress &epsilon p of Ti39CeNi40Cu20 and Fe64.4CeMn14.3Si9.4Cr10C0.9 alloys were up to 2635 MPa and 13.8%, and 2905 MPa and 30.1%, respectively. |
| Databáze: | OpenAIRE |
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