A Method to Determine Energy and Power of a Fracture Process in Polycrystals by Means of HVTEM

被引：0
|
作者：
Alejandro Tamayo-Meza, Pedro [1 ]
Yermishkin, Viacheslav Alexandrovich [2 ]
Manuel Sandoval-Pineda, Juan [1 ]
Armando Flores-Herrera, Luis [1 ]
Gustavo Rodriguez-Canizo, Ricardo [1 ]
机构：
[1] Inst Politecn Nacl, Escuela Super Ingn Mecan & Elect, Secc Estudios Posgrad & Invest, Lab Fuerza Atom, Azcapotzalco 02250, DF, Mexico
[2] Russian Acad Sci, Inst Met BAIKOV, Moscow, Russia
来源：
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING | 2014年 / 2014卷
关键词：
CRACK;
D O I：
10.1155/2014/274502
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Main crack propagation process in polycrystalline materials is very complex due to intercrystalline sliding mechanism effects. Multiple factors make it considerably difficult to analyze the state of stresses in the crack tip within the theoretical scope of linear fracture mechanics (LFM). As a basis for the suggested Bilby-Cottrell-Swindenmodel, we propose amethod to determine the state of stresses in the tip of a propagating crack in microspecimens subjected to tension and measured inside a high voltage transmission electron microscope (HVTEM). Based on the electron microscopy observations of a main crack and the formation of microcracks in the plastic zone, the J-integral was determined.
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页数：6
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