CuZr-based bulk metallic glass and glass matrix composites fabricated by selective laser melting
Liang Deng 1Long Zhang 2Konrad Kosiba 1René Limbach 3Lothar Wondraczek 3Gang Wang 4Dongdong Gu 5Uta Kühn 1Simon Pauly6
作者信息
- 1. Leibniz IFW Dresden,Institute for Complex Materials,Helmholtzstraβe 20,D-01069,Dresden,Germany
- 2. Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China
- 3. Otto Schott Institute of Materials Research,University of Jena,Fraunhoferstraβe,D-07743 Jena,Germany
- 4. Laboratory for Microstructure,Institute of Materials,Shanghai University,Shanghai,200444,China
- 5. College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,210016,China
- 6. Leibniz IFW Dresden,Institute for Complex Materials,Helmholtzstraβe 20,D-01069,Dresden,Germany;University of Applied Sciences Aschaffenburg,Würzburger Straβe 45,D-63743,Aschaffenburg,Germany
- 折叠
Abstract
Monolithic bulk metallic glass and glass matrix composites with a relative density above 98 ％ were produced by processing Cu46Zr46Al8 (at.％) via selective laser melting (SLM).Their microstructures and mechanical properties were systematically examined.B2 CuZr nanocrystals (30-100 nm in diameter) are uniformly dispersed in the glassy matrix when SLM is conducted at an intermediate energy input.These B2 CuZr nanocrystals nucleate the oxygen-stabilized big cube phase during a remelting step.The presence of these nanocrystals increases the structural heterogeneity as indirectly revealed by mircrohardness and nanoindentation measurements.The corresponding maps in combination with calorimetric data indicate that the glassy phase is altered by the processing conditions.Despite the formation of crystals and a high overall free volume content,all additively manufactured samples fail at lower stress than the as-cast glass and without any plastic strain.The inherent brittleness is attributed to the presence of relatively large pores and the increased oxygen content after selective laser melting.
Key words
Selective laser melting/CuZr-based glass/Bulk metallic glass matrix composites/Phase formation/Mechanical properties引用本文复制引用
基金项目
出版年
2021
NETL
NSTL
维普
万方数据