FullText URL fulltext.pdf
Author Karunathilaka, Nuwan| Tada, Naoya| Uemori, Takeshi| Hanamitsu, Ryota| Fujii, Masahiro| Omiya, Yuya| Kawano, Masahiro|
Keywords cold forging high-speed tool steel lubrication residual stress surface roughness tool deformation
Published Date 2019-07-12
Publication Title Metals
Volume volume9
Issue issue7
Publisher MDPI
Start Page 783
ISSN 2075-4701
Content Type Journal Article
language 英語
OAI-PMH Set 岡山大学
Copyright Holders © 2019 by the authors.
File Version publisher
DOI 10.3390/met9070783
Web of Science KeyUT 000482332400067
Related Url isVersionOf https://doi.org/10.3390/met9070783
JaLCDOI 10.18926/46996
FullText URL mfe_36_1_007_016.pdf
Author Li, Yan| Abe, Takeji| Tada, Naoya| Kanazawa, Masanori|
Abstract The change in the surface morphology of polycrystalline titanium during tensile plastic deformation is studied, using the scanning probe microscope as well as the laser scanning microscope. The observation shows that the slip occurs mainly near grain boundary at the strain range of ε < 0.05. The slip develops with the applied strain, and the slip on the second slip system or the crossing of slip lines appear. The surface roughness increases linearly with the applied strain. The height difference between the grain boundary area and the inner grain area also increases with the applied strain, though the increase rate becomes low after the applied strain of about 0.3. The nano-scale height difference of the surface step of slip lines increases with the applied strain, though it remains almost constant after the applied strain of 0.4. The averaged surface roughness measured with the scanning probe microscope is in good agreement with that measured with the laser scanning microscope.
Keywords Plasticity Polycrystalline Titanium Tensile Deformation Surface Morphology Slip Twin Probe Scanning Microscope Laser Scanning Microscope
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2001-12
Volume volume36
Issue issue1
Start Page 7
End Page 16
ISSN 0475-0071
language 英語
File Version publisher
NAID 80012831215
JaLCDOI 10.18926/46995
FullText URL mfe_36_1_001_006.pdf
Author Kondou, Ryouji| Abe, Takeji| Tada, Naoya| Shimizu, Ichiro|
Abstract Change in crystal orientation and strain of individual grains during tensile plastic deformation are studied to clarify on the microscopic deformation behavior of polycrystalline copper. The orientation of grain is measured by electron backscatter diffraction (EBSD) technique in the scanning electron microscope. The principal strain of grain is also measured by obtaining the approximated ellipse of strain distribution. The deformation of grains dependent on their initial orientation and the rotation of the principal strain during uniaxial tension are clarified.
Keywords Polycrystalline Copper Plastic Deformation SEM EBSD Method Grain Orientation Crystal Orientation Map
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2001-12
Volume volume36
Issue issue1
Start Page 1
End Page 6
ISSN 0475-0071
language 英語
File Version publisher
NAID 120003497021
JaLCDOI 10.18926/14135
FullText URL Mem_Fac_Eng_39_1_7.pdf
Author Wang, Xiaoqun| Abe, Takeji| Tada, Naoya| Shimizu, Ichiro|
Abstract Roughening on free surface of polycrystalline metal during plastic deformation is closely related to the inhomogeneous deformation in the respective grain at the surface. Uniaxial tensile tests are carried out on annealed pure aluminum sheet specimens with various averaged grain sizes. The roughening is measured by a 3-dimensional stylus instrument to examine the roughness change in both sides of specimen surfaces at each strain. The irregularities on one side are reversed on the backside, when the averaged grain size is as large as the thickness of the specimen. Discussions are made on the relation between the surface shapes of both sides adopting the cross correlation factor. The strains of respective grains are also measured from the grain boundary shape before and after plastic deformation. There are some deviations in the strains of the grains and their standard deviation increases with the applied strain.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2005-01
Volume volume39
Issue issue1
Start Page 7
End Page 15
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002308149