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Updated: Jul 4, 2025
08:55
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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Elemental partitioning-mediated crystalline-to-amorphous phase transformation under quasi-static deformation
Ge Wu1, Chang Liu2, Yong-Qiang Yan3
1Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) and Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, 710049, Xi'an, China. gewuxjtu@xjtu.edu.cn.
Nature Communications
|February 9, 2024
Summary
This study reveals a new crystalline-to-amorphous phase transformation during plastic deformation in nanolaminated composites. This discovery enables the design of advanced crystal-glass alloys with exceptional strength and plasticity.
Area of Science:
- Materials Science
- Metallurgy
- Solid-State Physics
Background:
- Transformation induced plasticity (TIP) typically involves diffusionless phase transformations during plastic deformation.
- Understanding novel phase transformation mechanisms is crucial for designing advanced materials.
Purpose of the Study:
- To investigate elemental partitioning-mediated crystalline-to-amorphous phase transformation during quasi-static plastic deformation.
- To explore the potential of this mechanism for developing high-performance alloys.
Main Methods:
- Fabrication of a Cr-Ni-Co (crystalline)/Zr-Ti-Nb-Hf-Ni-Co (amorphous) nanolaminated composite.
- Quasi-static plastic deformation experiments.
- Analysis of atomic intermixing and phase transformation at interfaces.
Main Results:
- Observed elemental partitioning-mediated crystalline-to-amorphous phase transformation.
- Atomic intermixing at interfaces driven by large negative mixing enthalpy.
- Formation of a distinct amorphous phase with altered composition and structure.
- Reduced crystalline phase size enhancing strain hardening.
Conclusions:
- Elemental partitioning drives crystalline-to-amorphous transformation under plastic deformation.
- Enables design of novel crystal-glass composites with enhanced strength and plasticity.
- This approach offers a pathway for developing advanced high-performance alloys.
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