Effects of Annealing on Enthalpy Recovery and Nanomechanical Behaviors of a La-Based Bulk Metallic Glass
Structural relaxation and nanomechanical behaviors of La<sub>65</sub>Al<sub>14</sub>Ni<sub>5</sub>Co<sub>5</sub>Cu<sub>9.2</sub>Ag<sub>1.8</sub> bulk metallic glass (BMG) with a low glass transition temperature during annealing...
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| Format: | Article |
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MDPI AG
2021-04-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/4/579 |
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| author | Ting Shi Lanping Huang Song Li |
| author_facet | Ting Shi Lanping Huang Song Li |
| author_sort | Ting Shi |
| collection | DOAJ |
| description | Structural relaxation and nanomechanical behaviors of La<sub>65</sub>Al<sub>14</sub>Ni<sub>5</sub>Co<sub>5</sub>Cu<sub>9.2</sub>Ag<sub>1.8</sub> bulk metallic glass (BMG) with a low glass transition temperature during annealing have been investigated by calorimetry and nanoindentation measurement. The enthalpy release of this metallic glass is deduced by annealing near glass transition. When annealed below glass transition temperature for 5 min, the recovered enthalpy increases with annealing temperature and reaches the maximum value at 403 K. After annealed in supercooled liquid region, the recovered enthalpy obviously decreases. For a given annealing at 393 K, the relaxation behaviors of La-based BMG can be well described by the Kohlrausch-Williams-Watts (KWW) function. The hardness, Young’s modulus, and serrated flow are sensitive to structural relaxation of this metallic glass, which can be well explained by the theory of solid-like region and liquid-like region. The decrease of ductility and the enhancement of homogeneity can be ascribed to the transformation from liquid-like region into solid-like region and the reduction of the shear transition zone (STZ). |
| first_indexed | 2024-03-10T12:41:07Z |
| format | Article |
| id | doaj.art-f12db970a2534e17bbff0d1319ac9b62 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T12:41:07Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-f12db970a2534e17bbff0d1319ac9b622023-11-21T13:55:08ZengMDPI AGMetals2075-47012021-04-0111457910.3390/met11040579Effects of Annealing on Enthalpy Recovery and Nanomechanical Behaviors of a La-Based Bulk Metallic GlassTing Shi0Lanping Huang1Song Li2State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, ChinaScience and Technology on High Strength Structural Materials Laboratory, Central South University, Changsha 410083, ChinaState Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, ChinaStructural relaxation and nanomechanical behaviors of La<sub>65</sub>Al<sub>14</sub>Ni<sub>5</sub>Co<sub>5</sub>Cu<sub>9.2</sub>Ag<sub>1.8</sub> bulk metallic glass (BMG) with a low glass transition temperature during annealing have been investigated by calorimetry and nanoindentation measurement. The enthalpy release of this metallic glass is deduced by annealing near glass transition. When annealed below glass transition temperature for 5 min, the recovered enthalpy increases with annealing temperature and reaches the maximum value at 403 K. After annealed in supercooled liquid region, the recovered enthalpy obviously decreases. For a given annealing at 393 K, the relaxation behaviors of La-based BMG can be well described by the Kohlrausch-Williams-Watts (KWW) function. The hardness, Young’s modulus, and serrated flow are sensitive to structural relaxation of this metallic glass, which can be well explained by the theory of solid-like region and liquid-like region. The decrease of ductility and the enhancement of homogeneity can be ascribed to the transformation from liquid-like region into solid-like region and the reduction of the shear transition zone (STZ).https://www.mdpi.com/2075-4701/11/4/579bulk metallic glassesstructure relaxationenthalpy recoverynanoindentationannealing |
| spellingShingle | Ting Shi Lanping Huang Song Li Effects of Annealing on Enthalpy Recovery and Nanomechanical Behaviors of a La-Based Bulk Metallic Glass Metals bulk metallic glasses structure relaxation enthalpy recovery nanoindentation annealing |
| title | Effects of Annealing on Enthalpy Recovery and Nanomechanical Behaviors of a La-Based Bulk Metallic Glass |
| title_full | Effects of Annealing on Enthalpy Recovery and Nanomechanical Behaviors of a La-Based Bulk Metallic Glass |
| title_fullStr | Effects of Annealing on Enthalpy Recovery and Nanomechanical Behaviors of a La-Based Bulk Metallic Glass |
| title_full_unstemmed | Effects of Annealing on Enthalpy Recovery and Nanomechanical Behaviors of a La-Based Bulk Metallic Glass |
| title_short | Effects of Annealing on Enthalpy Recovery and Nanomechanical Behaviors of a La-Based Bulk Metallic Glass |
| title_sort | effects of annealing on enthalpy recovery and nanomechanical behaviors of a la based bulk metallic glass |
| topic | bulk metallic glasses structure relaxation enthalpy recovery nanoindentation annealing |
| url | https://www.mdpi.com/2075-4701/11/4/579 |
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