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Spatial and microstructural dependence of mechanical properties and wear performance of functionally graded Al-TiAl3 in situ composite
Shahid Bahonar Univ Kerman, Dept Mat Engn & Met, Kerman 7618868366, Iran..ORCID iD: 0000-0002-5818-0599
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering. Shahid Bahonar Univ Kerman, Dept Mat Engn & Met, Kerman 7618868366, Iran..ORCID iD: 0000-0003-1779-8728
2019 (English)In: SN APPLIED SCIENCES, ISSN 2523-3963, Vol. 1, no 10, article id UNSP 1190Article in journal (Refereed) Published
Abstract [en]

Effect of morphology and spatial distribution ofTiAl(3) particles on the hardness, the tensile behavior and the wear performance of functionally graded Al-TiAl3 in situ composite (FGC) was investigated. Initially, FGC was produced by interaction between solid Ti and liquid Al. Based on the spatial distribution and morphology of TiAl3 particles in the microstructure of FGC, three distinctive regions including blocky-particle region, mixed-particle region (blocky and short plate particles) and lengthy plate-particle region were studied. Results of this study showed that the blocky-particle region had promoted tensile strength as well as highly improved wear resistance. In addition, this region with higher density of blocky particles and low interparticle spacing showed a brittle fracture. The mixed-particle region with a lower density of blocky particles had a ductile fracture mechanism while the plate-particle region showed cleavage fracture.The dominant wear mechanism for regions including blocky particles was determined to be mild oxidation while it was delamination wear for regions containing plate particles. Finally, correlation between mechanical properties, wear resistance and microstructure of FGC was discussed.

Place, publisher, year, edition, pages
SPRINGER INTERNATIONAL PUBLISHING AG , 2019. Vol. 1, no 10, article id UNSP 1190
Keywords [en]
Microstructure, Mechanical properties, Wear resistance, Functionally graded Al-TiAl3 in situ composite, Particle spatial distribution, Morphology
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-262955DOI: 10.1007/s42452-019-1217-6ISI: 000489305900001OAI: oai:DiVA.org:kth-262955DiVA, id: diva2:1374990
Note

QC 20191203

Available from: 2019-12-03 Created: 2019-12-03 Last updated: 2019-12-03Bibliographically approved

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Doostmohammadi, Hamid

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