ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Martensitic transformation temperatures were measured and transformation strains wereevaluated in a promising high temperature shape memory alloy TiAu with a compositional range from46 to 53mol%Au. It was found by differential scanning calorimetry that martensitic transformationstart temperature (Ms) is kept almost constant value of 880K in the Au-rich side of the stoichiometriccomposition. On the other hand, Ms decreases monotonically with decreasing Au content in theAu-poor side. X-ray diffraction analysis revealed that apparent phase of all the alloys at roomtemperature is B19 martensite phase. Under an assumption that the atomic volume is constant duringmartensitic transformation, the lattice parameters of B2 parent phase and maximum transformationstrain were calculated. It was found that the maximum transformation strain depends on chemicalcomposition and that it reaches 10.75% for Ti-53mol%Au alloy. The value is comparable to that ofTi-Ni
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1541.pdf
