Enhanced plasticity of Fe-based bulk metallic glass by tailoring microstructure
(1. School of Materials Science and Engineering, Southwest University, Chongqing 400715, China;
2. National Engineering Research Center for Magnesium Alloys, Chongqing University,
Chongqing 400044, China;
3. Shenzhen Key laboratory of Special Functional Materials, Shenzhen 518060, China;
4. College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China)
2. National Engineering Research Center for Magnesium Alloys, Chongqing University,
Chongqing 400044, China;
3. Shenzhen Key laboratory of Special Functional Materials, Shenzhen 518060, China;
4. College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China)
Abstract: The room temperature compressive plasticity of Fe75Mo5P10C8.3B1.7 bulk metallic glass (BMG) was improved from 0.5% to 1.8% by increasing the sample diameter from 1.5 mm to 2.0 mm. With increasing the sample diameter to 2.0 mm, a heterogeneous microstructure with in-situ formed α-Fe dendrite sparsely distributed in the amorphous matrix can be attained. This heterogeneous microstructure is conceived to be highly responsible for the enhanced global plasticity in this marginal Fe-based BMG.
Key words: bulk metallic glass; composite; rapid-solidification; mechanical property