Improved plasticity and fracture toughness in metallic glasses via surface crystallization

Fan, Jihui; Chen, Aiying; Wang, Juan; Shen, Jun; J, Lu

doi:10.1016/j.intermet.2011.05.012

Cited by 14 publications

(7 citation statements)

References 47 publications

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“…The residual stress in the crystallization affected zones may also help to block the main shear crack . Secondary shear bands are found to initiate due to the congregated crystallites, making a larger contribution to plasticity . This ‘shear band multiplication’ resulting from the gradient microstructure deflects and delays the critical crack, producing global enhancement of plasticity and toughness in the present material.…”

Section: Toughing Mechanism Embedded In the New Strategiesmentioning

confidence: 85%

High‐Strength and High‐Ductility Nanostructured and Amorphous Metallic Materials

2014

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The development of materials with dual properties of high strength and high ductility has been a constant challenge since the foundation of the materials science discipline. The rapid progress of nanotechnology in recent decades has further brought this challenge to a new era. This Research News highlights a few newly developed strategies to optimize advanced nanomaterials and metallic glasses with exceptional dual mechanical properties of high strength and high ductility. A general concept of strain non-localization is presented to describe the role of multiscale (i.e., macroscale, microscale, nanoscale, and atomic scale) heterogeneities in the ductility enhancement of materials reputed to be intrinsically brittle, such as nanostructured metallic materials and bulk metallic glasses. These nanomaterials clearly form a new group of materials that display an extraordinary relationship between yield strength and the uniform elongation with the same chemical composition. Several other examples of nanomaterials such as those reinforced by nanoprecipitates will also be described.

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Section: Toughing Mechanism Embedded In the New Strategiesmentioning

confidence: 85%

High‐Strength and High‐Ductility Nanostructured and Amorphous Metallic Materials

2014

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“…As Ti-based BMGs possess properties similar to Zr-based BMGs, these strategies can also be adopted to improve the room temperature plasticity of Ti-based BMGs. Fan et al [191] proposed a novel technology called surface mechanical attrition treatment (SMAT) to improve the plasticity of BMGs. By surface crystallization, isolated crystallite islands are formed in the top surface layer, which act as the obstacles to restrict the localization of shear bands and avoid the development of cracks.…”

Section: Surface Treatmentmentioning

confidence: 99%

Review on the Research and Development of Ti-Based Bulk Metallic Glasses

Gong

Deng

Jin

et al. 2016

Metals

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Abstract:Ti-based bulk metallic glasses (BMGs) are very attractive for applications because of their excellent properties such as high specific strength and high corrosion resistance. In this paper, we briefly review the current status of the research and development of Ti-based bulk metallic glasses. Emphasis is laid on glass-forming ability, mechanical properties, corrosion resistance, and biocompatibility.

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“…In some cases, the plasticity of BMGs can be enhanced by the appropriate control of the size and distribution of crystals. For example, isolated crystallite islands can be created to optimize the mechanical performance of BMGs via surface crystallization induced by surface mechanical attrition treatment process 37 . Improved tensile plastic strain can be obtained by the formation of microstructural heterogeneity induced by cold rolling 38 .…”

Section: Discussionmentioning

confidence: 99%

Liquid-solid joining of bulk metallic glasses

Huang

Xue

Guo

et al. 2016

Sci Rep

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Here, we successfully welded two bulk metallic glass (BMG) materials, Zr51Ti5Ni10Cu25Al9 and Zr50.7Cu28Ni9Al12.3 (at. %), using a liquid-solid joining process. An atomic-scale metallurgical bonding between two BMGs can be achieved. The interface has a transition layer of ~50 μm thick. The liquid-solid joining of BMGs can shed more insights on overcoming their size limitation resulting from their limited glass-forming ability and then promoting their applications in structural components.

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Improved plasticity and fracture toughness in metallic glasses via surface crystallization

Cited by 14 publications

References 47 publications

High‐Strength and High‐Ductility Nanostructured and Amorphous Metallic Materials

High‐Strength and High‐Ductility Nanostructured and Amorphous Metallic Materials

Review on the Research and Development of Ti-Based Bulk Metallic Glasses

Liquid-solid joining of bulk metallic glasses

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