Grain size effect on the structural parameters of the stress induced epsilonhcp: martensite in iron-based shape memory alloy
The aim of this work was to study the effect of austenitic grain size (GS) reduction on the structural parameters of the epsilonhcp - martensite in stainless shape memory alloy (SMA). Rietveld refinement data showed an expansion in c-axis and a reduction in a and b-axis with thermo-mechanical cycles for all samples analyzed. Samples with 75 < GS (µm) < 129 were analyzed. It was also observed an increase of the unit cell volume in this phase with GS reduction. The smallest grain size sample (GS = 75 µm) presented a c/a ratio of 1.649, and approximately 90% of total shape memory recovery.
Main Authors: | , , , |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
ABM, ABC, ABPol
2008
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392008000100012 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|