• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of a mechanical spectroscopy measurement system for an extended temperature range and its applications.

Research Project

Project/Area Number 13559004
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 広領域
Research InstitutionKyoto University

Principal Investigator

NUMAKURA Hiroshi  Kyoto University, Department of Materials Science and Engineering, Associate Professor, 工学研究科, 助教授 (40189353)

Co-Investigator(Kenkyū-buntansha) TANAKA Tatsushi  Kyoto University, Department of Advanced Materials Science, Associate Professor, 工学部, 助教授 (30236575)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥11,100,000 (Direct Cost: ¥11,100,000)
Fiscal Year 2003: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2002: ¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2001: ¥6,100,000 (Direct Cost: ¥6,100,000)
Keywordsanelasticity / elastic energy loss / forced-vibration method / point defects / diffusion / atomic jumps / ordered alloys / intermetallic compounds / 強制振動法
Research Abstract

(1) Development of the system
A system for characterizing the elasticity and anelasticity of solids has been successfully developed, which works by the forced-vibration method in the frequency range between 10^<-5> Hz and 10 Hz from room temperature to 1,000℃. It measures the relation between the stress and strain (the real and imaginary parts of the complex elastic modulus) under forced torsional vibration of a rod or plate-shaped specimen, of 0.5-1 mm in thickness and 10-50 mm in length, with a strain amplitude between 10^<-5> to 10^<-4>. The measurement sequence is fully automated with a computer. With the temperature held constant, measurements are repeated with sweeping the frequency, thereby obtaining the elastic modulus and internal friction as functions of frequency. It is also capable of free-decay measurements in resonance vibration, at a constant temperature or under a steady temperature variation.
(2) Applications
Anelastic relaxation due to jumps of antisite atoms in L1_2 ordered alloys has been measured, from which the jump rates of the atoms and the diffusion coefficients have been successfully evaluated. The relaxation effects due to stress-induced reorientation of interstitial solute atoms in bcc metals have been systematically measured, and it has been verified that the instrument can determine the relaxation strengths and relaxation rates at satisfactory accuracy.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] H.Numakura: "Mechanical relaxation due to interstitial solute atoms in metals"Solid State Phenomena. 89. 93-114 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.-S.Guan, Y.Nishizawa, K.Okamura, H.Numakura, M.Koiwa: "Interaction between substitutional and interstitial solute atoms in alpha iron studies by mechanical spectroscopy"Materials Science and Engineering A. 370・1-2. 73-77 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] (共同執筆): "鉄鋼便覧 第4版第4巻「物性値測定法」"(社)日本鉄鋼協会. 200 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Numakura: "Mechanical relaxation due to interstitial solute atoms in metals"Solid State Phenomena. Vol.89. 93-114 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] X.-S.Guan, Y.Nishizawa, K.Okamura, H.Numakura, M.Koiwa: "Interaction between substitutional and interstitial solute atoms in alpha iron studied by mechanical spectroscopy"Materials Science and Engineering A. Vol.370, Nos.1-2. 73-77 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] NUMAKURA Hiroshi, TANAKA Katsushi (co-authored with several others): "Methods of physical property measurements"Steel Handbook, 4th Edition (The Iron and Steel Institute of Japan). Vol.4. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Nose: "Tracer and chemical diffusion in L1_2-ordered Pt_3Fe"Materials Transactions. 44・1. 34-39 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] A.Kushida: "Chemical diffusion in L1_0-ordered FePt"Materials Transactions. 44・1. 59-62 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] X.-S.Guan: "Interaction between substitutional and interstitial solute atoms in alpha iron studied by mechanical spectroscopy"Materials Science and Engineering A. 370・1-2(印刷中). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Numakura: "Mechanical Relaxation due to Interstitial Solutes in Metals"Solid State Phenomena. 89. 93-114 (2003)

    • Related Report
      2002 Annual Research Report

URL: 

Published: 2001-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi