...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Engineering Fracture Mechanics >On sample size effects in fracture toughness determination of Bulk Metallic Glasses
【24h】

On sample size effects in fracture toughness determination of Bulk Metallic Glasses

机译：关于骨折韧性测定散装金属眼镜的样本尺寸效应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Bulk Metallic Glasses (BMG) show extraordinarily high values of strength and elastic strain. Despite the, in most cases, macroscopically brittle behaviour (especially in tension and bending), extremely high fracture toughness values are reported. Even though it is sometimes stated that huge plastic zones and strain softening make K-based approaches (ASTM E399) or J-integral based approaches (ASTM E1820) difficult for BMG, changes in material behaviour or intrinsic metallic glass materials properties are still inferred by many authors in order to explain the results. In addition, the limited dimensions of fully glassy bulk ingots mean that the available specimen sizes differ from those required by the common standards of fracture toughness testing. In this context, reported results from fracture toughness of prominent Pd-, Pt-and Zr-based BMG are analysed. An in-depth discussion of the size dependent effects on the mechanical loading conditions during fracture toughness testing is provided. As a result, it is shown that the differences and peculiarities of characterized BMG toughness mainly relate to geometrical/ mechanical effects of small scale sample testing. They are not due to an intrinsic material property or to a size dependent ramification of intrinsic material behaviour.
机译：散装金属眼镜（BMG）显示出极高的强度和弹性应变值。尽管如此，在大多数情况下，宏观脆性行为（特别是张力和弯曲），报告了极高的断裂韧性值。尽管有时被说明巨大的塑料区域和菌株软化使基于K的方法（ASTM E399）或基于J-积分的方法（ASTM E1820）难以BMG，但仍然推断出材料行为或内在金属玻璃材料的变化许多作者为了解释结果。此外，完全玻璃块锭的有限尺寸意味着可用的样品尺寸与裂缝韧性试验的共同标准所需的标本尺寸不同。在这种情况下，分析了突出的PD-，基于Zr和Zr基BMG的断裂韧性的结果。提供了对裂缝韧性测试期间对机械负载条件的尺寸依赖性影响的深入讨论。结果表明，表征BMG韧性的差异和特性主要涉及小规模样本测试的几何/机械效应。它们不是由于内在材料特性或尺寸依赖性分枝的内在材料行为。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号