EFFECT OF AGING ON THE MARTENSITIC TRANSFORMATION CHARACTERISTICS OF A Ni-RICH NiTiHf HIGH TEMPERATURE SHAPE MEMORY ALLOY Academic Article

abstract

• The effect of aging on the microstructure and transformation temperatures of Ni 50.3 Ti 34.7 Hf 15 was studied. Small interparticle spacing induced by the precipitation of very fine particles, 45 nm in size, decreases Ms after short term aging at 450C and 500C. The precipitate size and volume fraction increase with aging at longer times and higher temperatures, and as a consequence, Ms increases due to Ni -depletion of the matrix. In general, thermal stability is improved due to precipitation hardening.

authors

• Karaman, Ibrahim

published proceedings

• FUNCTIONAL MATERIALS LETTERS

author list (cited authors)

• Evirgen, A., Basner, F., Karaman, I., Noebe, R. D., Pons, J., & Santamarta, R.

citation count

• 64

complete list of authors

• Evirgen, Alper||Basner, Fabian||Karaman, Ibrahim||Noebe, Ronald D||Pons, Jaume||Santamarta, Ruben

publication date

• December 2012

publisher

• World Scientific Publishing  Publisher

keywords

• High Temperature Shape Memory Alloys
• Martensitic Transformation
• Precipitation Hardening
• Thermal Stability

Digital Object Identifier (DOI)

• 10.1142/S1793604712500385

start page

• 1250038

end page

• 1250038

volume

• 5

issue

• 4

URL

• http%3A%2F%2Fdx.doi.org%2F10.1142%2Fs1793604712500385