Damping Capacity of Ti-Nb-Al Shape Memory β-Titanium Alloy with {001}<SUB>β</SUB>⟨110⟩<SUB>β</SUB> Texture

• Inamura Tomonari

  Precision and Intelligence Laboratory, Tokyo Institute of Technology

• Hosoda Hideki

  Precision and Intelligence Laboratory, Tokyo Institute of Technology

• Wakashima Kenji

  Precision and Intelligence Laboratory, Tokyo Institute of Technology

• Kim Jae Il

  Materials Science and Engineering, Dong-A University

• Kim Hee Young

  Institute of Materials Science, University of Tsukuba

• Miyazaki Shuichi

  Institute of Materials Science, University of Tsukuba

Bibliographic Information

Other Title

• Damping Capacity of Ti-Nb-Al Shape Memory β-Titanium Alloy with {001}β〈110〉β Texture
• Damping Capacity of Ti Nb Al Shape Memory ベータ Titanium Alloy with 001 ベータ 110 ベータ Texture
• Damping Capacity of Ti-Nb-Al Shape Memory &beta;-Titanium Alloy with {001}<SUB>&beta;</SUB>&lang;110&rang;<SUB>&beta;</SUB> Texture

Abstract

Damping capacity (tanδ) of Ti-24 mol%Nb-3 mol%Al (Ti-Nb-Al) shape memory alloy (SMA) with {001}_β⟨110⟩_β texture was examined upon cooling from 423 K to 123 K by dynamic mechanical analysis (DMA) in a tensile mode. The {001}_β⟨110⟩_β texture was well developed by a cold-rolling with reduction in thickness of 99% followed by a heat treatment at 873 K for 3.6 ks. The apparent phase of the material at room temperature was the β-phase (bcc) containing small amount of α-phase (hcp) and the martensite start temperature (M_s) of the β-α″(C-orthorhombic) thermoelastic martensitic transformation was about 250 K. The β-phase was equiaxed and averaged grain size was 2 μm. The angle between the longitudinal direction of the DMA specimens and the rolling direction (RD) was defined as φ and was 0, 30, 45, 60 and 90 degrees on the normal plane. Damping capacity, tanδ, depended on the stress-amplitude (σ_o) and φ. The peak height of tanδ during the martensitic transformation, Δtanδ, was proportional to σ_o for each φ and also proportional to the maximum transformation strain along the loading direction (ε_MAX) which is determined by the crystallography of the transformation. A proportional relationship between Δtanδ and σ_oε_MAX was found and indicated that the interaction between the transformation and the applied stress plays an important role in the damping of the textured SMA.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 48 (3), 395-399, 2007

  The Japan Institute of Metals and Materials

Keywords

• β-titanium
• texture
• Internal friction
• anisotropy

Details

• CRID: 1390282679228030336
• NII Article ID: 130004453477
• NII Article ID: 10018734598
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.48.395
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 8670885
• Web Site: http://id.ndl.go.jp/bib/8670885
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8670885
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/48/3/48_MH200629/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed