Surface roughening and deformation of grains during uniaxial tension of polycrystalline iron

Citation
I. Shimizu et al., Surface roughening and deformation of grains during uniaxial tension of polycrystalline iron, JSME A, 44(4), 2001, pp. 499-506
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
JSME INTERNATIONAL JOURNAL SERIES A-SOLID MECHANICS AND MATERIAL ENGINEERING
ISSN journal
1344-7912 → ACNP
Volume
44
Issue
4
Year of publication
2001
Pages
499 - 506
Database
ISI
SICI code
1344-7912(200110)44:4<499:SRADOG>2.0.ZU;2-4
Abstract
Changes in the three-dimensional (3D) shapes of roughened surfaces and the inhomogeneous deformation behaviors of individual grains during uniaxial te nsion of polycrystalline iron are experimentally investigated. The principa l strains of each grain are evaluated by obtaining the approximated ellipse of the strain distribution of the grain, and then the relationship between the change in surface roughening and grain deformation is discussed. It is found that the mountains and the valleys of the roughened surface elongate in the axial direction with increasing amplitude during uniaxial tension. The grains continue to deform with the applied strain, though the rate of i ncrease of the maximum principal strain differs among grains. From the comp arison between the roughening phenomenon and the deformation of grains, it is found that surface roughening is closely related to the mutual rotation of grains. Thus, roughness increases due to the different deformation behav iors of individual grains.