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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
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Composition effect on intrinsic plasticity or brittleness in metallic glasses
Yuan-Yun Zhao1, Akihisa Inoue2, Chuntao Chang1
11] Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China [2] Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
Scientific Reports
|July 22, 2014
Summary
Metallic glasses near intermetallic compounds exhibit superior ductility and resist embrittlement. This discovery offers new guidelines for developing advanced ductile metallic glasses for engineering applications.
Area of Science:
- Materials Science
- Metallurgy
- Solid State Physics
Background:
- Metallic glasses (MGs) offer high plasticity, crucial for advanced engineering.
- The underlying reasons for the varying ductility and brittleness in MGs remain unclear.
- Understanding composition and thermal history effects on MG plasticity is essential.
Purpose of the Study:
- To clarify the physical origins of ductile/brittle behavior in metallic glasses.
- To investigate the relationship between composition, thermal history, and plasticity in MGs.
- To establish guidelines for discovering new ductile metallic glass compositions.
Main Methods:
- Comparative analysis of metallic glasses near intermetallic compounds versus eutectics.
- Tracing element distribution rearrangement within shear bands.
- Monitoring potential energy changes during shear band sliding.
Main Results:
- Metallic glasses with compositions at or near intermetallic compounds show extreme ductility.
- These intermetallic-rich MGs are insensitive to annealing-induced embrittlement.
- A strong correlation exists between element distribution features and MG plasticity.
Conclusions:
- Compositions near intermetallic compounds are key to achieving high ductility in MGs.
- Element distribution and energy changes within shear bands dictate plasticity.
- These findings provide a universal strategy for designing ductile MGs.
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