Elevated-temperature strength of Al-7.8mass%V-4mass%Fe alloy containing icosahedral phase produced by extrusion of atomized powder.

• KIMURA Hisamichi

  Institute for Materials Research, Tohoku University

• INOUE Akihisa

  Institute for Materials Research, Tohoku University

• SASAMORI Kenichiro

  Institute for Materials Research, Tohoku University

• KAWAMURA Yoshihito

  Institute for Materials Research, Tohoku University

Bibliographic Information

Other Title

• 準結晶を含むガス噴霧Ａｌ‐７．８％Ｖ‐４％Ｆｅ合金粉末の押出成形と耐熱強度
• 準結晶を含むガス噴霧Al-7.8%V-4%Fe合金粉末の押出成形と耐熱強度
• ジュンケッショウ オ フクム ガス フンム Al 7.8パーセント V 4パー

Abstract

The bulk material with a size of about φ8 mm × 300 mm was produced by extrusion of gas atomized Al–7.8 mass%V–4 mass%Fe alloy powder at 623, 673 and 723 K. The gas atomized powder consists of icosahedral, fcc–Al and Al₁₁V phases and has a spherical shape with an average diameter of about 31 μm. The bulk material extruded at 623 K consists of icosahedral and Al phases and has a high packing density of approximately 100%. The ultimate tensile strength (σ_UTS), plastic elongation (ε_P), Vickers hardness (HV) and Young's modulus (E) at room temperature are 585 MPa, 4.5%, 190 and 84.8 GPa, respectively. And then the σ_UTS, ε_P and HV at 573 K are 305 MPa, 5.0% and 90, respectively. The HV remains unchanged even after holding for 432 ks at 573 K. The coefficient of thermal expansion is 21.4 × 10⁻⁶K⁻¹, which is smaller by 15% than that of the 7075–T6 alloy. The bulk materials extruded at 673 and 723 K also have the similar high elevated temperature strength of 291 and 277 MPa, respectively, at the temperature 573 K. The extruded bulk materials with high elevated-temperature strength are expected to develop as a new type of high strength material.

Journal

• Journal of Japan Institute of Light Metals

  Journal of Japan Institute of Light Metals 47 (10), 539-544, 1997

  The Japan Institute of Light Metals

Keywords

• aluminum-vanadium-iron alloy
• powder
• extrusion
• mechanical property
• high elevated-temperature strength

Details

• CRID: 1390001206337262592
• NII Article ID: 10003381122
• NII Article ID: 10003796003
• NII Article ID: 10003905014
• NII Article ID: 10003381292
• NII Book ID: AN00069773
• DOI: 10.2464/jilm.47.539
• COI: 1:CAS:528:DyaK2sXmvF2mtL0%3D
• ISSN: 18808018
• ISSN: 04515994
• NDL BIB ID: 4324280
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4324280
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed