Shear band evolution and deformation mechanism in bulk metallic glasses

大块金属玻璃的剪切带演化和变形机制

• 批准号: 20860011
• 负责人: LIU Yanghui
• 金额: $ 2.1万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (Start-up)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20860011/
• 关键词: 金属ガラス; MEMS; 機械的性質; 延性

In this work, we derive a universal scaling law, τ_y=3R・(T_g-RT)/V, that uncovers an inherent relationship of yield strength τ_y with glass transition temperature T_g, molar volume V of metallic glasses and RT the room temperature. This equation is derived from fundamental thermodynamics and validated by various metallic glasses with well-defined yielding. The linearity between τ_y and T_g demonstrates that yielding of metallic glasses is correlated intrinsically with glass-liquid transition instead of melting.

本文导出了一个普适的标度律τ_y=3R·（T_g-RT）/V，揭示了屈服强度τ_y与玻璃化温度T_g、金属玻璃的摩尔体积V和室温RT之间的内在关系。该方程是从热力学基础推导出来的，并通过各种金属玻璃的屈服行为得到了验证。τ_y与T_g之间的线性关系表明，金属玻璃的屈服与玻璃-液体转变而非熔化有内在的相关性。

项目成果

Shear bands evolution in bulk metallic glass with extended plasticity

• DOI: 10.1016/j.jnoncrysol.2008.09.026
• 发表时间: 2008-12
• 期刊: Journal of Non-crystalline Solids
• 影响因子: 3.5
• 作者: Yinyao Liu;Wen-chao Wang

Energetic criterion on the intrinsic ductility of bulk metallic glasses

• DOI: 10.1016/j.scriptamat.2009.12.042
• 发表时间: 2010-04
• 期刊: Scripta Materialia
• 影响因子: 6
• 作者: Yanhui Liu;Ke Wang;A. Inoue;T. Sakurai;Mingwei Chen

Mechanical behavior of micro-sized metallic glasses

微米金属玻璃的力学行为

• 发表时间: 2008
• 作者: Y. H. Liu;K. Wang;D. Pan;M. W. Chen
• 通讯作者: M. W. Chen

Plastic Deformation-Assisted Synthesis of Metallic Glass Nanostructures

• DOI: 10.2320/matertrans.m2009027
• 发表时间: 2009-07
• 期刊: Materials Transactions
• 影响因子: 1.2
• 作者: Yanhui Liu;Ke Wang;D. Pan;Hao Wang;K. Nakayama;A. Inoue;Weihua Wang;Mingwei Chen

Mechanical behavior of microsized metallic glasses

微型金属玻璃的力学行为

• 发表时间: 2009
• 作者: Y. H. Liu;M. W. Chen
• 通讯作者: M. W. Chen