Synthesis and structural characterization of co-al binary alloys

Date

2018-10-27

Author

Dinler, Ali Fırat
Mekhrabov, Amdulla O.
Akdeniz, Mahmut Vedat

Metadata

Show full item record

Item Usage Stats

159
views

0
downloads

As a part of an investigation on the design and development of Co-based superalloys for hightemperature applications, studies have been made to investigate synthesis route, heat treatment regime and structural characterization of binary Co-Al alloys. Cobalt-rich side of Co-Al binary system was examined by preparing 6 different alloy compositions (1.23, 8.40, 16.72, 19.50, 21.50 and 25 at. % Al), which were produced by arc melting technique. It has been found that DOOR\V KDYLQJ UHODWLYHO\ KLJK $O FRQWHQW DW Al) reveal primary FCC-Co and eutectic mixture B2-type ordered CoAl and HCP-Co phases at room temperature whereas no CoAl precipitation was detected for low Al FRQWDLQLQJ DOOR\V DW $O Furthermore, martensitic phase transformation which does not require fast cooling rates has yielded to FCC to HCP transformation in low Al containing alloys. It is interesting to note that, solidification and heat treated structures of Co-Al binary alloys disagree and not consistent with current equilibrium phase diagrams published in literature.

URI

http://www1.metalurji.org.tr/immc2018/bildiriler_kitabi.pdf
https://hdl.handle.net/11511/77531

Conference Name

IMMC2018-19th International Metallurgy and Materials Congress, (25 - 27 Ekim 2018)

Collections

Department of Mechanical Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Synthesis of acrylic based high internal phase emulsion polymers and their application in chromatography Tunç, Yeliz; Hasırcı, Nesrin; Department of Polymer Science and Technology (2009) High internal phase emulsion polymers (PolyHIPEs) are new generation materials with their high porosity and interconnected open-cell structures and finds applications in areas such as supports for catalytic systems, separation media and tissue engineering scaffolds. Styrene based PolyHIPEs are currently the most popular choice, but solvent compatibility and poor mechanical properties of these materials prevent their applications. Therefore development of new polyHIPEs with desired mechanical and cellular pr...
Design of oxygen-doped TiZrHfNbTa refractory high entropy alloys with enhanced strength and ductility Iroc, L.K.; Tukac, O.U.; Tanrisevdi, B.B.; El-Atwani, O.; Tunes, M.A.; Kalay, Yunus Eren; Aydoğan Güngör, Eda (2022-11-01) © 2022Refractory high entropy alloys (RHEAs) are considered promising materials for high-temperature applications due to their thermal stability and high-temperature mechanical properties. However, most RHEAs have high density (>10 g/cm3) and exhibit limited ductility at low temperatures and softening at high temperatures. In this study, we show that oxygen-doping can be used as a new alloy design strategy for tailoring the mechanical behavior of the TiZrHfNbTa alloy: a novel low-density (7.98 g/cm3) ductil...
Time resolved laser induced incandescence for soot and cenospheres measurements in oil flames Allouis, Christophe Gerard; D'Alessio, A; Noviello, C; Beretta, F (2000-01-01) The quantitative characterization of sooting flames in terms of soot load and total soot surface area continues to be a major challenge in both fundamental investigations and practical applications. More particularly, a major interest can be found to discriminate the two classes of particulate, namely soot and cenosphere, presents in power generation plants fuelled with heavy fuel oils.
Synthesis of hierarchical calcium carbonate particles Oral, Cağatay Mert; Kapusuz, Derya; Ercan, Batur (null; 2018-11-01) Recently, synthesis of hierarchically structured porous materials gained particular interest for various industrial applications. As a biocompatible and chemically stable material, hierarchical CaCO3 structures formed by ordered aggregation and growth of nanocrystals offer significant advantages for structural and biomedical use compared to their currently-used alternatives. During solution processing, incorporating doping agents to calcium positions or altering CaCO3 supersaturation, new crystals can heter...
Synthesis of Emulsion-Templated Acrylic-Based Porous Polymers: From Brittle to Elastomeric Tunc, Yeliz; Hasırcı, Nesrin; ULUBAYRAM, KEZBAN (2012-01-01) High internal phase emulsion polymers (PolyHIPEs) are novel materials that have high porosity and interconnected open-cell structure and are used in various applications such as supports for catalytic systems, media for separation of similar molecules, and scaffolds for tissue engineering. In this study, 90% porous acrylic based polyHIPE structures with various cellular structure and mechanical characteristics were developed by using stearyl acrylate (SA), isodecyl acrylate (IDA), isobornyl methacrylate (IB...

Citation Formats

A. F. Dinler, A. O. Mekhrabov, and M. V. Akdeniz, “Synthesis and structural characterization of co-al binary alloys,” İstanbul, Türkiye, 2018, p. 140, Accessed: 00, 2021. [Online]. Available: http://www1.metalurji.org.tr/immc2018/bildiriler_kitabi.pdf.