期刊
ADVANCED ENGINEERING MATERIALS
卷 -, 期 -, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adem.202201011
关键词
equal channel angular pressing; fracture toughness; grain shape; severe plastic deformation; ultrafine-grained
This study focuses on the fracture properties of pure iron deformed at 200 degrees C by equal angular channel pressing, evaluating the fracture toughness for different specimen orientations and comparing the results with material processed by a different route. The findings indicate that route B-C offers higher fracture toughness compared to route A.
The mechanical behavior of pure iron (Armco-iron) deformed at 200 degrees C by equal angular channel pressing using processing route B-C is investigated with a focus on the fracture properties. In particular, the fracture toughness in terms of elastic-plastic fracture mechanics is evaluated for different specimen orientations with respect to the last deformation step. In addition, the results are comprehensively compared with material processed by route A. The microstructural features of both deformation routes are presented and the underlying microstructure-property relationships are discussed. Both deformation routes (A and B-C) lead to a comparable strength even though the microstructural features differ. Route A contains a banded and well-aligned structure almost parallel to the extrusion direction. For route B-C, the microstructural alignment is rotated with respect to the pre-crack orientation and the grain structure is more heterogeneous. For both deformation routes, the crack plane orientation plays a significant role in the fracture characteristics. The fracture toughness along the extrusion direction, with substantially low fracture toughness for route A, is markedly enhanced for route B-C. Consequently, route B-C offers a pathway to obtaining severe plastic deformation (SPD) materials with high damage tolerance and a considerably lower extent of anisotropy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据