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| Study on Notch Toughness of Fe-based Amorphous Composites |
| Received:March 16, 2021 Revised:March 26, 2021 |
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| DOI：doi：10.3969/j.issn.1007-7545.2021.07.012 |
| KeyWord:Amorphous composite materials; fracture morphology; microstructure; notch toughness |
| Author | Institution |
| ZHAO Yan-chun |
兰州理工大学省部共建有色金属加工与再利用国家重点实验室 |
| WANG Bo |
兰州理工大学省部共建有色金属加工与再利用国家重点实验室 |
| KOU Sheng-zhong |
兰州理工大学省部共建有色金属加工与再利用国家重点实验室 |
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| Abstract: |
| Fe-15Mn-5Si-xCr-0.2C (wt%) amorphous composites were fabricated by water-cooled copper crucible magnetic levitation smelting and copper mold negative pressure suction casting method. Microstructure of alloys was characterized by XRD. Single-sided notch specimen was used to study notch toughness, and morphology of specimen after fracture was analyzed by SEM. The results show that alloy system exhibits deformtion induced phase transition as loading, thus though TRIP effect enhances toughness and plasticity. Notch toughness (KQ) and fracture energy (GC) of Fe-15Mn-5Si-15Cr-0.2C sample are (108.466±5) MPa?m1/2 and 600.25 kJ/m2, respectively. A large amount of dimples and vein pattern areas are formed on fracture surface. The results indicate that appropriate addition of Cr element is beneficial to improve toughness of Fe-based amorphous composites. |
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