Skip to main content

Structural engineering with NiTi. I: Basic materials characterization

Publication ,  Journal Article
Tyber, J; McCormick, J; Gall, K; DesRoches, R; Maier, JH; Abdel Maksoud, AE
Published in: Journal of Engineering Mechanics
September 1, 2007

The overarching goal of this two-part paper is to provide a more unified understanding of NiTi shape memory alloys intended for use in structural engineering applications. Here, we present results from basic materials characterization of large diameter polycrystalline NiTi bars. Deformation processed bars with diameters of 12.7, 19.1, and 31.8mm and various heat treatments were characterized at multiple length scales. Transmission electron microscopy revealed a nanometer scale precipitate structure present in the heat-treated, but not as-received bars. Spatial crystallographic texture measurements performed with electron backscatter diffraction, reveal a 〈111〉 texture along the longitudinal bar drawing axis in the majority of the bar, with a secondary longitudinal 〈110〉 component near the center of the bars. The prominence of the 〈110〉 texture increases with decreasing bar diameter or increasing percentage of deformation processing. Transformation temperatures and hardness were measured on samples extracted from the bars and are shown to depend strongly on bar heat treatment, but not bar diameter. The fine coherent precipitate structure induced during low temperature aging places transformation temperatures in the pseudoelastic range at room temperature and can be used to tailor material hardness. © 2007 ASCE.

Duke Scholars

Published In

Journal of Engineering Mechanics

DOI

ISSN

0733-9399

Publication Date

September 1, 2007

Volume

133

Issue

9

Start / End Page

1009 / 1018

Related Subject Headings

  • Civil Engineering
  • 4017 Mechanical engineering
  • 4005 Civil engineering
  • 0913 Mechanical Engineering
  • 0905 Civil Engineering
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Tyber, J., McCormick, J., Gall, K., DesRoches, R., Maier, J. H., & Abdel Maksoud, A. E. (2007). Structural engineering with NiTi. I: Basic materials characterization. Journal of Engineering Mechanics, 133(9), 1009–1018. https://doi.org/10.1061/(ASCE)0733-9399(2007)133:9(1009)
Tyber, J., J. McCormick, K. Gall, R. DesRoches, J. H. Maier, and A. E. Abdel Maksoud. “Structural engineering with NiTi. I: Basic materials characterization.” Journal of Engineering Mechanics 133, no. 9 (September 1, 2007): 1009–18. https://doi.org/10.1061/(ASCE)0733-9399(2007)133:9(1009).
Tyber J, McCormick J, Gall K, DesRoches R, Maier JH, Abdel Maksoud AE. Structural engineering with NiTi. I: Basic materials characterization. Journal of Engineering Mechanics. 2007 Sep 1;133(9):1009–18.
Tyber, J., et al. “Structural engineering with NiTi. I: Basic materials characterization.” Journal of Engineering Mechanics, vol. 133, no. 9, Sept. 2007, pp. 1009–18. Scopus, doi:10.1061/(ASCE)0733-9399(2007)133:9(1009).
Tyber J, McCormick J, Gall K, DesRoches R, Maier JH, Abdel Maksoud AE. Structural engineering with NiTi. I: Basic materials characterization. Journal of Engineering Mechanics. 2007 Sep 1;133(9):1009–1018.

Published In

Journal of Engineering Mechanics

DOI

ISSN

0733-9399

Publication Date

September 1, 2007

Volume

133

Issue

9

Start / End Page

1009 / 1018

Related Subject Headings

  • Civil Engineering
  • 4017 Mechanical engineering
  • 4005 Civil engineering
  • 0913 Mechanical Engineering
  • 0905 Civil Engineering