Size effects on material yield strength/deformation/ fracturing properties

Armstrong Ronald W.

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Size effects on material yield strength/deformation/ fracturing properties

机译：对材料屈服强度/变形/压裂性能的尺寸影响

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The effects of specimen size, Hall-Petch (H-P) grain or subgrain size, particle size plus spacing, and crack size on the yield strength, plastic deformation, and fracturing properties of crystalline materials are described on a dislocation mechanics basis. The size effects are assessed at relevant macro-and/or micro-and/or nano-scale dimensions; in the latter case, at the upper-limiting strength levels. The description is applied mostly to face-centered cubic (FCC), body-centered cubic (BCC), and hexagonal close-packed (HCP) metals but also involves grain size/particle size-dependent (composite) steel material behaviors. Competition is described for the role of dislocation pile-ups versus hole-joining mechanisms for ductile failure. Grain size-dependent microhardness and strain rate sensitivity measurements are presented for nano-grain size strengthening and grain size weakening, respectively. An intrinsic size effect is demonstrated for silicon crystal nano-indentation hardness testing, which, on microscale loading, leads to evaluation of crack size dependence and, for polycrystalline alumina, to associated H-P behavior for the fracture mechanics stress intensity.

机译：基于位错的基础描述了样品尺寸，霍尔 - 胶合（H-P）颗粒或粒度尺寸，粒度加空间和裂纹尺寸，粒度加上晶体材料的屈服强度，塑性变形和裂缝性能。在相关的宏观和/或微型和/或纳米尺度尺寸下评估大小效应;在后面的情况下，在上限的强度水平。该描述主要用于面对中心的立方（FCC），以身体为中心的立方（BCC）和六边形近填充（HCP）金属，但也涉及晶粒尺寸/粒度依赖性（复合）钢材行为。描述了脱位堆积的作用，对韧性失效的孔连接机制的作用。谷粒尺寸依赖性微硬度和应变速率敏感性测量分别用于分别用于纳米粒度强化和晶粒尺寸弱化。对于硅晶体纳米缩进硬度试验证明了固有尺寸效应，其在微尺寸负荷上导致对裂纹尺寸依赖性的评估，并且对于多晶氧化铝，对裂缝力学应力强度的相关H-P行为。

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来源
《Journal of Materials Research》 |2019年第13期|2161-2176|共16页
作者
Armstrong Ronald W.;
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作者单位

Univ Maryland Dept Mech Engn College Pk MD 20742 USA;

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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
关键词
strength; grain size; dislocations;

机译：力量;晶粒尺寸;脱臼;

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专利

1. Size effects on material yield strength/deformation/ fracturing properties [J] . Armstrong Ronald W. Journal of Materials Research . 2019,第13期

机译：尺寸对材料屈服强度/变形/断裂性能的影响
2. Extended Hall-Petch Relationships for Yield, Cleavage and Intergranular Fracture Strengths of bcc Steel and Its Deformation and Fracture Behaviors [J] . Heo N. H., Heo Y. -U., Kwon S. K., Metals and Materials International . 2018,第2期

机译：延长霍尔 - PACH关系，用于BCC钢的产量，切割和晶间断裂强度及其变形和断裂行为
3. Effects of size and boundary conditions on the yield strength of heterogeneous materials [J] . Q.-C. He Journal of the Mechanics and Physics of Solids . 2001,第11期

机译：尺寸和边界条件对异质材料屈服强度的影响
4. NDT - DO WE HAVE THE POTENTIAL TO PREDICT MATERIAL PROPERTIES AS YIELD STRENGTH, TENSILE STRENGTH AND FRACTURE TOUGHNESS ON THE COMPONENT? A STATE OF THE ART SURVEY. [C] . G. Dobmann European Conference on Fracture . 2011

机译：NDT-我们是否有潜力预测材料的性能，例如组件的屈服强度，拉伸强度和断裂韧性？最新调查。
5. Numerical and experimental investigation of deformation and strength properties of lithophysae-rich tuff and analog materials. [D] . Avar, Bahri Burcin. 2002

机译：富岩藻凝灰岩和类似材料的变形和强度特性的数值和实验研究。
6. Influences of Cutting Speed and Material Mechanical Properties on Chip Deformation and Fracture during High-Speed Cutting of Inconel 718 [O] . Bing Wang, Zhanqiang Liu, Xin Hou, 2018

机译：Inconel 718高速切削过程中切削速度和材料力学性能对切屑变形和断裂的影响
7. Application of an Equation Representing Reciprocal Fracture Strength versus Square Root of Fracture Origin Size to the Estimation of Fracture Toughness of Hard or Brittle Materials. [O] . Yutaka Yanaba, Koji Hayashi 2000

机译：表示倒数裂缝强度的方程的应用与骨折尺寸的平方根尺寸估计硬质或脆性材料的断裂韧性。

Size effects on material yield strength/deformation/ fracturing properties

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