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Study on high-temperature embrittlement of aluminum alloys using ultrasound measurement and ab-initio calculation

Research Project

Project/Area Number 26820009
Research Category

Grant-in-Aid for Young Scientists (B)

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

Principal Investigator

TANIGAKI Kenichi  大阪大学, 基礎工学研究科, 助教 (40631875)

Project Period (FY) 2014-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords材料力学 / 高温脆化 / 第一原理計算 / A5083合金 / 粒界結合力 / アルミニウム合金
Outline of Final Research Achievements

In this study, the effect of a trace sodium at high temperature ductility of aluminum alloys was experimentally measured and theoretically studied by ab-initio calculations.
It was found that a trace of sodium plays an important role in high temperature ductility loss of 5083 Aluminum alloys. On the other hand, 237ppm of sodium brought about severe embitterment even at room temperature. In addition, it was suggested that Na segregation at Al grain boundary reduces grain-boundary cohesion and additional element inhibits Na’s effect.

Report

(3 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • Research Products

    (5 results)

All 2015

All Presentation (5 results)

  • [Presentation] 5083アルミニウム合金の高温延性に与える微量ナトリウムおよび結晶粒径の影響2015

    • Author(s)
      藤原祐樹、谷垣健一、堀川敬太郎、小林秀敏
    • Organizer
      軽金属学会関西支部 若手研究者・院生による研究発表会
    • Place of Presentation
      大阪府立大学 I-SITEなんば
    • Year and Date
      2015-12-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] 不純物元素の偏析がAl結晶粒界の結合力に 及ぼす影響に関する第一原理計算2015

    • Author(s)
      谷垣 健一、平 健介、堀川 敬太郎、小林 秀敏
    • Organizer
      日本機械学会 M&M2015材料力学カンファレンス
    • Place of Presentation
      慶應義塾大学 矢上キャンパス
    • Year and Date
      2015-11-21
    • Related Report
      2015 Annual Research Report
  • [Presentation] 5083アルミニウム合金の高温延性に微量ナトリウムが与える影響2015

    • Author(s)
      藤原祐樹、谷垣健一、堀川敬太郎、小林秀敏
    • Organizer
      第128回軽金属学会春期大会
    • Place of Presentation
      東北大学 青葉山キャンパス
    • Year and Date
      2015-05-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] 5083アルミニウム合金の高温延性に微量ナトリウムが与える影響2015

    • Author(s)
      藤原祐樹, 谷垣健一, 堀川敬太郎, 小林秀敏
    • Organizer
      一般社団法人軽金属学会 第128回春期大会
    • Place of Presentation
      東北大学
    • Year and Date
      2015-05-15 – 2015-05-17
    • Related Report
      2014 Research-status Report
  • [Presentation] Al結晶粒界の結合力に及ぼす液体金属元素の影響に関する第一原理計算2015

    • Author(s)
      平健介, 谷垣健一, 堀川敬太郎, 小林秀敏
    • Organizer
      日本機械学会 関西学生会平成26年度学生員卒業研究発表講演会
    • Place of Presentation
      京都大学
    • Year and Date
      2015-03-14
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2017-05-10  

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