Al-Mg-Si系合金の大気中低ひずみ速度変形時に生じる環境脆化  [in Japanese] Environmental embrittlement of Al-Mg-Si base alloys deformed at low strain rates in laboratory air  [in Japanese]

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Author(s)

    • 謝 明君 HSIEH Ming-Chun
    • 東京大学大学院工学系研究科材料学専攻 Graduate Student,Department of Materials Science, The University of Tokyo

Abstract

Two medium-strength Al–Mg–Si alloys exhibited environmental embrittlement when deformed in laboratory air at low strain rates. Tensile specimens prepared from hot rolled plates of Al–0.75%Mg–0.75%Si and Al–0.75%Mg–0.75%Si–0.35%Cu alloys were solution treated for 1 h at 540°C, quenched in water and aged for 30 min at 175°C. They were deformed in tension at initial strain rates ranging from 1.7 × 10<sup>−7</sup> to 8.3 × 10<sup>−4</sup> s<sup>−1</sup> in a laboratory air with a relative humidity of 40–80%. Both alloys showed ductile transgranular fracture when tested at a strain rate of 8.3 × 10<sup>−4</sup> s<sup>−1</sup>, however, they exhibited intergranular embrittlement with lower tensile elongation and reduction in area when tested at a strain rate of 1.7× 10<sup>−7</sup> s<sup>−1</sup>. This tendency of intergranular embrittlement is prominent in the Al–0.75%Mg–0.75%Si–0.35%Cu alloy and the effect of hydrogen absorbed from the test environment on such embrittlement was studied using deuterium as a tracer of hydrogen.

Journal

  • Journal of Japan Institute of Light Metals

    Journal of Japan Institute of Light Metals 52(6), 250-255, 2002-06-30

    The Japan Institute of Light Metals

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Codes

  • NII Article ID (NAID)
    10008833319
  • NII NACSIS-CAT ID (NCID)
    AN00069773
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    04515994
  • NDL Article ID
    6200436
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-284
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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