Rapidly solidified powder metallurgy of Al-Ti-Fe-X alloys

Journal Article · Fri Apr 23 04:00:00 EDT 1999 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(99)00024-X· OSTI ID:361734

Kawamura, Yoshihito; Inoue, Akihisa ^[1]; Takagi, Makoto; Ohta, Hidenobu; Imura, Toru ^[2]; Masumoto, Tsuyoshi ^[3]

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1. Tohoku Univ., Sendai (Japan). Inst. for Materials Research
2. Aichi Inst. of Tech., Toyota (Japan)
3. Research Inst. for Electric and Magnetic Materials, Sendai (Japan)

Mechanical properties of powder metallurgy (P/M) aluminum alloys have been improved through a rapid solidification (RS) technique. High-strength RS P/M aluminum alloys were recently developed in Al-Ni-(Y or Ce)-(Co, Ti or Zr) systems containing from 89 to 91 at% Al. The alloy systems have a glass-forming ability, resulting in easy attainment of nanocrystalline structure. Recently, the authors have reported that Al{sub 93}Ti{sub 3.5}Fe{sub 3.5}RS P/M alloys exhibited tensile strength of 786 MPa, plastic elongation of 3.2%, high thermal stability up to 600 K, low density of 2.90 gcm{sup {minus}3}, high Young`s modulus of 91 GPa and low coefficient of thermal expansion of 20.2 {times} 10{sup {minus}6} K{sup {minus}1}. The Al-Ti-Fe P/M alloys are expected to be applied as elevated-temperature materials such as Al-Fe-Ce, Al-Fe-Mo, Al-Fe-V-Si and Al-Cr-Zr RS P/M alloys, because the Ti and Fe elements exhibit limited solid solubility and low diffusivity in aluminum. The transition metals of V, Cr, Mo and Zr have low diffusivity in aluminum. The addition of these elements to the Al-Ti-Fe alloys is expected to improve its thermal stability and elevated-temperature strength. The purpose of this paper is to report the synthesis of elevated-temperature Al-Ti-Fe-X (X = V, Cr, Mo and Zr) RS P/M alloys.

• OSTI ID: 361734
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 10 Vol. 40; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
EXTRUSION
IRON ALLOYS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
MICROSTRUCTURE
POWDER METALLURGY
SOLIDIFICATION
TITANIUM ALLOYS
TRANSITION ELEMENTS