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Development of X-ray stress measurement technique to achieve accurate evaluation for strength of polygranular graphite

Research Project

Project/Area Number 16K17983
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Materials/Mechanics of materials
Research InstitutionTokyo City University

Principal Investigator

Kumagai Masayoshi  東京都市大学, 工学部, 講師 (20582498)

Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsX線応力測定 / 黒鉛 / 残留応力 / X線回折 / X線 / 機械材料・材料力学 / 解析・評価
Outline of Final Research Achievements

A polygranular graphite consists of graphite crystallites. A graphite has strong elastic and strength anisotropy due to its crystal structure, especially in-plane and out-of-plane directions. To reveal mechanical behavior in several directions, stress measurements in several directions are required. In this study, to realize the measurements, a ψ-diffraction X-ray stress measurement system was developed that is equipped a cradle stage onto the current Ω-diffraction X-ray stress measurement system. This system can measure diffractions from 004 indices
The measurements using Ω-diffraction X-ray stress measurements were also conducted for the measurements of several directions. Stress measurements were performed during applying stress by four-point bending or uniaxial compressing on the specimens. The relationship between applied macroscopic stress and measured stress by X-ray stress measurement, which corresponds to elastic lattice strain in each crystal direction, were revealed.

Report

(3 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • Research Products

    (3 results)

All 2017

All Presentation (3 results)

  • [Presentation] バルク状黒鉛のX線応力測定法の検討2017

    • Author(s)
      熊谷正芳、岩田沙織、秋田貢一、黒田雅利、大谷眞一
    • Organizer
      第51回X線材料強度に関するシンポジウム
    • Place of Presentation
      兵庫県私学会館(兵庫県神戸市)
    • Year and Date
      2017-07-27
    • Related Report
      2016 Research-status Report
  • [Presentation] バルク黒鉛の四点曲げ負荷により得られる応力ひずみ線図の検討2017

    • Author(s)
      後藤辰也, 熊谷正芳
    • Organizer
      日本材料学会関東支部 2017学生研究交流会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 側傾法によるX線応力測定装置のアライメント法2017

    • Author(s)
      西井啓太, 熊谷正芳
    • Organizer
      日本材料学会関東支部 2017学生研究交流会
    • Related Report
      2017 Annual Research Report

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Published: 2016-04-21   Modified: 2019-03-29  

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