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| Laser 3D Printing of Iron Based Bulk Amorphous Alloy Composite |
| ZHANG Yueyuan1 , HUANG Guokun2 , LÜ Yunzhuo3 |
| ( 1. Department of Mechanical Engineering, Anshan Technician College, Anshan 114016, China; 2. Shenyang Railway Signal Co., Ltd., Shenyang 110020, China; 3. School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China ) |
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Abstract Fe-based amorphous alloy has attracted great attention due to its excellent soft magnetic properties, high hardness, high strength and other advantages. However, the size of Fe-based amorphous alloys prepared by copper mold casting in laboratory and industrial fields are still small, which seriously restricts the practical application of Fe-based amorphous alloys as structural materials in industrial fields. The laser 3D printing method provides an opportunity to solve these problems. However, according to the current research reports at home and abroad, there are serious cracks in Fe-based amorphous alloy prepared by laser 3D printing technology, so it is impossible to use this technology to shape large size Fe-based amorphous alloy samples. In this paper, a second phase with better plasticity was introduced into Fe-based amorphous alloy to absorb thermal stress and prevent the cracking of Febased amorphous alloy in the process of laser 3D printing, and large size Fe-based amorphous alloy composites were successfully printed. It is found that the large-size Fe-based amorphous alloy composites formed by the above method have no macroscopic cracks and have good formability, but microcosmic cracks are still found in the local area of Fe-based amorphous alloy. Since Cu wrapped Fe-based amorphous alloy in the middle, these local microcracks did not expand, so it did not run through the whole material, so that the molding property of the printed Fe-based amorphous alloy composite material was not greatly affected.
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2020, 
