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Metallurgical Transactions A

, Volume 17, Issue 3, pp 451–460 | Cite as

Deformation of a Burgers oriented bimetallic bicrystal of alpha-beta (Ti-13Mn)

  • Chong Soo Lee
  • Harold Margolin
Mechanical Behaviour

Abstract

The deformation behavior of a Burgers oriented α-β-Ti-13Mn bimetallic bicrystal was studied at two plastic strains, 0.52 and 2.08 pct. Two single crystals, α and β, each corresponding to the orientation of its respective bicrystal component were also investigated. The stress axes were\([1\bar 7610]_\alpha \) and [1218]β. The interface planes were\((\bar 1\bar 3580)_\alpha \) and\((\bar 334)_\beta \) and lay in the x’-z’ plane. The deformation behavior of the a component differed from that of the a single crystal because of plastically induced stresses,T y’z’ ,T x’z’ ,T x’y’ , and σ x’x’ . Prismatic slip and\(\{ 11\bar 21\} \) twinning were found in the single crystal α whereas the bicrystal revealed additionally pyramidal andc + a slip, the latter at the interface. Slip on the front and back surfaces was different and both thec + a and twinning systems acted to maintain compatibility. Slip in the β single crystal and the β bicrystal component were quite similar. However, there were differences in the intensity and amount of primary slip, (231)\([\bar 11\bar 1{\text{]}}\), on the front and back surfaces. The diminished amount of (231)\([\bar 11\bar 1{\text{]}}\) slip on the back surface was due to plastically induced stresses, and on the front surface the primary slip cross slipped to\((1\bar 2\bar 3)[\bar 11\bar 1]\) slip which triggeredc + a slip in α. On the back surface the dominant slip system was\((21\bar 1){\text{ }}[\bar 11\bar 1{\text{]}}\) which acted in response to the plastically induced stresses. An approximate calculation revealed that the interface deformation zone had about twice the flow stress of the average bicrystal stress.

Keywords

Metallurgical Transaction Slip System Back Surface Basal Slip Cross Slip 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The Metallurgical of Society of AIME 1986

Authors and Affiliations

  • Chong Soo Lee
    • 1
  • Harold Margolin
    • 2
  1. 1.Department of Chemical Engineering and Materials ScienceUniversity of MinnesotaMinneapolis
  2. 2.Department of Metallurgy and Materials SciencePolytechnic UniversityBrooklyn

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