Small-Scale Approaches to Evaluate the Mechanical Properties of Quasi-Brittle Reactor Core Graphite
Small-Scale Approaches to Evaluate the Mechanical Properties of Quasi-Brittle Reactor Core Graphite
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DOI：
10.1520/stp157820130127
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发表时间：
2014-07
影响因子：
7.4
通讯作者：
Dong Liu;P. Heard;S. Nakhodchi;P. Flewitt
中科院分区：
文献类型：
--
作者：
Dong Liu;P. Heard;S. Nakhodchi;P. Flewitt
从厘米级到微米级的一系列小尺度力学测试技术已被用于测量核反应堆堆芯石墨的性能，包括堆芯A级石墨和Gilsocarbon石墨，这些测试方法包括四点弯曲（厘米级）、径向压缩（毫米级）、微米级悬臂弯曲（微米级）和纳米压痕（微米级）。这些方法既能测量材料的弹性模量和抗弯强度等力学性能，又能提供有关变形和抗弯机理的详细信息。对于每一个测试，一个例子，使用一个特定的试样的几何形状，并讨论了相对于特定的力学性能评估和宏观尺度的数据进行比较。Nano-indentation进行Mannippt收到2013年8月31日;接受出版2014年6月6日;在线发表2014年7月18日。1界面分析中心，物理学院，布里斯托，布里斯托，BS 8 1 TL，英国（通讯作者），电子邮件：dong. bristol.ac.uk
ABSTRACT A range of small scale, from centimetre scale to micrometre scale, mechanicaltesting techniques have been used to measure the properties of nuclear reactorcore graphite, including Pile Grade A (PGA) graphite and Gilsocarbon graphite.These testing methods include four-point bending (centimetre scale), diametralcompression (millimetre scale), micro-scale cantilever bending (micrometrescale) and nano-indentation (micrometre scale). These methods provide both ameasure of mechanical properties including elastic modulus and fracturestrength and detailed information concerning the deformation and fracturemechanisms. For each test, an example using a particular specimen geometry isgiven and discussed with respect to the particular mechanical propertyevaluated and compared with macro-scale data. Nano-indentation was carried Manuscript received August 31, 2013; accepted for publication June 6, 2014; published online July 18, 2014. 1 Interface Analysis Centre, School of Physics, Univ. of Bristol, Bristol, BS8 1TL, UK (Corresponding author),e-mail: dong.liu@bristol.ac.uk