Local temperature rises during mechanical testing of metallic glasses

Y. Zhang; N.A. Stelmashenko; Z.H. Barber; W.H. Wang; J.J. Lewandowski; A.L. Greer

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Local temperature rises during mechanical testing of metallic glasses

机译：金属玻璃的机械测试过程中局部温度升高

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Under ambient conditions, plastic flow in metallic glasses is sharply localized into shear bands. The heat content of, and consequent temperature rise at, shear bands in three bulk metallic glasses are compared using a recently reported fusible coating method. The minimum shear offsets necessary to detect local heating are determined. It is shown that the dependence of heat content on offset is consistent with frictional heating in the band. The effective stress on the band undergoing shear is 50-70% of the macroscopic shear stress, a ratio compared with simulations of shear-band initiation and operation. It is also noted that frictional heating can occur not only at shear bands, but also at mixed-mode cracks.

机译：在环境条件下，金属玻璃中的塑性流动会急剧地进入剪切带。使用最近报道的可熔涂层方法比较了三块大块金属玻璃中的剪切带的热量和相应的温度升高。确定检测局部加热所必需的最小剪切偏移。结果表明，热量对偏移的依赖性与带中的摩擦加热相一致。剪切带上的有效应力为宏观剪切应力的50-70％，与剪切带启动和运行的模拟相比，该比例较高。还应注意的是，摩擦加热不仅会发生在剪切带上，还会发生在混合模式的裂纹处。

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来源
《Journal of Materials Research》 |2007年第2期|419-427|共9页
作者
Y. Zhang; N.A. Stelmashenko; Z.H. Barber; W.H. Wang; J.J. Lewandowski; A.L. Greer;
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作者单位

Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ, United Kingdom;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类工程材料学;
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1. Local temperature rises during mechanical testing of metallic glasses [J] . Y. Zhang, N.A. Stelmashenko, Z.H. Barber Journal of Materials Research . 2007,第2期

机译：金属玻璃的机械测试过程中局部温度升高
2. Elucidating how correlated operation of shear transformation zones leads to shear localization and fracture in metallic glasses: Tensile tests on Cu-Zr based metallic-glass microwires, molecular dynamics simulations, and modelling [J] . Gan K. F., Jiang S. S., Huang Y. J., International Journal of Plasticity . 2019,第期

机译：阐明剪切变换区的相关操作如何导致金属玻璃中的剪切定位和骨折：Cu-Zr基金属玻璃微射线的拉伸试验，分子动力学模拟和建模
3. Mechanical response of bulk metallic glasses: Investigation by mechanical spectroscopy and compression tests. Elastic, viscoelastic and viscoplastic components [J] . Pelletier J.M., Gauthier C., Blandin J.J., Diffusion and Defect Data. Solid State Data, Part B. Solid State Phenomena . 2012,第Null期

机译：大块金属玻璃的机械响应：通过机械光谱学和压缩测试进行调查。弹性，粘弹性和粘塑性组件
4. Mechanical Response of Bulk Metallic Glasses: Investigation by Mechanical Spectroscopy and Compression Tests. Elastic, Viscoelastic and Viscoplastic Components [C] . J. M. Pelletier, C. Gauthier, J. J. Blandin, International Conference on Internal Friction and Mechanical Spectroscopy . 2012

机译：散装金属眼镜的机械响应：机械光谱和压缩试验研究。弹性，粘弹性和粘胶塑料部件
5. Thermomechanical Anisotropy of Bulk Metallic Glasses Induced by Elasto-static Loading for Prolonged Time at Room Temperature - A Case Study of Copper Hafnium Aluminum Bulk Metallic Glass. [D] . Mubarok, Arif. 2011

机译：室温下长时间静态静载荷引起的大块金属玻璃的热机械各向异性-以铜Ha铝大块金属玻璃为例。
6. Rate dependent of strength in metallic glasses at different temperatures [O] . Y. W. Wang, X. L. Bian, S. W. Wu, -1

机译：不同温度下金属玻璃强度的变化率
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。

Local temperature rises during mechanical testing of metallic glasses

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