Specifications

Publication year: 2012

Pages: 335-338

Language: English

ISSN: 02555476

CODEN: MSFOEP

ISBN-13: 9783037854396

Document type: Conference article (CA)

Conference name: 13th International Symposium on Eco-Materials Processing and Design,

ISEPD 2012

Conference date: January 7, 2012 - January 10, 2012

Conference location: Guilin, China

Conference code: 93066

Publisher: Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635,

Switzerland

Abstract: FeCoNi system equimolar alloys were fabricated by a vacuum arc melting. The

phase constitution of FeCoNi system alloys was determined by XRD analysis and the

microstructure was observed by OM. The comprehensive atomic radius δ, the mixing enthalpy

ΔHmix and the mixing entropy ΔSmix of alloys were also calculated according to relevant

equations. The results show that the addition of Ti, Al and Cu has an obvious influence on the

microstructure and phase constitution of FeCoNi system equimolar alloys. Single Ti addition

resulted in almost entire solid solution with a typical dendrite growth character and a little

unknown phase. However, further addition of Al, Cu or Al+Cu into the FeCoNiTi equimolar alloys

led to the occurrence of an entire solution phase with dendrite, coarse dendrite, and rosette

dendrite respectively. Such a phenomena suggested that the mixing entropy caused by the

increase of components number rather than the comprehensive atomic radius between the

elements or the mixing enthalpy of the alloy systems might be responsible for the formation of

Switzerland.

Number of references: 11

Main heading: Titanium alloys

Controlled terms: Alloys - Aluminum - Cerium alloys - Enthalpy -

Microstructure - Mixing - Solid solutions - Vacuum applications

Uncontrolled terms: Addition of Al - Alloy system - Atomic radius -

Compound - Cu addition - Dendrite growth - Equi-molar alloys - Mixing enthalpy

- Mixing entropy - Phase constitution - Solution phase - Structural evolution - Ti

addition - Vacuum arc melting - XRD analysis

Classification code: 802.3 Chemical Operations - 641.1 Thermodynamics - 633.1

Vacuum Applications - 933 Solid State Physics - 547.2 Rare Earth Metals - 541.1

Aluminum - 531.1 Metallurgy - 542.3 Titanium and Alloys

DOI: 10.4028/www.scientific.net/MSF.724.335

Database: Compendex

30.

Accession number: 20130515971344