Paper Title:
Towards SiGe Terahertz VCSELs
  Abstract

Asymmetric rolling, in which the circumferential velocities of the upper and lower rolls are different, can give rise to intense plastic shear strains and in turn shear deformation textures through the sheet thickness. The ideal shear deformation texture of fcc metals can be approximated by the <111> // ND and {001}<110> orientations, among which the former improves the deep drawability. The ideal shear deformation texture for bcc metals can be approximated by the Goss {110}<001> and {112}<111> orientations, among which the former improves the magnetic permeability along the <100> directions and is the prime orientation in grain oriented silicon steels. The intense shear strains can result in the grain refinement and hence improve echanical properties. Steel sheets, especially ferritic stainless steel sheets, and luminum alloy sheets may exhibit an undesirable surface roughening known as ridging or roping, when elongated along RD and TD, respectively. The ridging or roping is caused by differently oriented colonies, which are resulted from the <100> oriented columnar structure in ingots or billets, especially for ferritic stainless steels, that is not easily destroyed by the conventional rolling. The breakdown of columnar structure and the grain refinement can be achieved by asymmetric rolling, resulting in a decrease in the ridging problem.

  Info
Periodical
Materials Science Forum (Volumes 453-454)
Edited by
Dragan P. Uskokovic, Slobodan K. Milonjic, Dejan I. Rakovic
Pages
1-8
DOI
10.4028/www.scientific.net/MSF.453-454.1
Citation
R.W. Kelsall, Z. Ikonić, P. Harrison, D.J. Paul, S.A. Lynch, R. Bates, D.J. Norris, S.L. Liew, A.G. Cullis, D.D. Arnone, C.R. Pidgeon, P. Murzyn, D.J. Robbins, R.A. Soref, "Towards SiGe Terahertz VCSELs", Materials Science Forum, Vols. 453-454, pp. 1-8, 2004
Online since
May 2004
Export
Price
$35.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Akiyuki Takahashi, Kotoko Hirose, Naoki Soneda, Masanori Kikuchi
Abstract:In this work, the point defect production in α-Zr at 600K by displacement cascade with Primary Knock-on Atom (PKA) energy up to 20KeV has...
923
Authors: Hisao Kinoshita, N. Sakaguch, S. Watanabe, H. Takahashil, Masayoshi Kawai, Rolf Gotthardt, F. Phillipp
Abstract:The formation process of intermetallic compound under Ni+ion implantation into pure Al was studied at lower temperature below room...
1729
Authors: Akiyuki Takahashi, Masahiro Arita, Masanori Kikuchi
Abstract:This paper describes the computer simulation of irradiation growths induced by neutron irradiations in zirconium using a combination of...
889
Authors: Liang Bo Ao, Yuan Sheng Li, Lei Li, Zhi Xun Wen, Zhu Feng Yue
Smart/Intelligent Materials/Intelligent Systems
Abstract:The aerodynamic optimization for turbocharger turbine blade is studied using variable dimensionality analysis technology. The aerodynamic...
2801
Authors: Xiao Dong Zhang, Yan Gong, Ru Yi Gou, Jun Hua Li, Jian Ping Wu, Zhong Jian Jiang
Power and Fluid Machinery
Abstract:The structure angles should be calculated in the process of turbodrill’s cascade blade profile design. The angles are calculated according to...
2126