Výsledky vyhledávání - "R. I. Comăneci"

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Effects of Thermomechanical Processing on the Microstructure and Mechanical Properties of Fe-Based Alloys

Autor: Philipp Krooß, Bogdan Pricop, Gheorghe Gurau, M. Vollmer, Thomas Niendorf, Nicanor Cimpoesu, Elena Mihalache, Leandru-Gheorghe Bujoreanu, Vasile Dănuţ Cojocaru, Mihai Popa, Carmela Gurau, R. I. Comăneci

Publikováno v: Journal of Materials Engineering and Performance. 29:2274-2282

This study focuses on the unusual evolution of microstructure and mechanical properties caused by thermomechanical processing of FeMnAlNi alloys. For Fe43.5Mn34Al15Ni7.5, which is an eligible candidate for superelastic applications, the effects of su

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::670f8e979d8da5398ff5ace09ae4585b
https://doi.org/10.1007/s11665-020-04609-z

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Some structural effects related to the abnormal grain growth in FeMnAlNi shape memory alloys

Autor: Elena Mihalache, Leandru-Gheorghe Bujoreanu, R. I. Comăneci, Bogdan Pricop, Mihai Popa, Vasile Dănuț Cojocaru

Publikováno v: Materials Today: Proceedings. 19:931-940

Oligocrystalline Fe43.5Mn34Al15Ni7.5 alloys, with an average grain size larger than their thickness/ diameter, experience superelasticity between 223 … 423K which recommends them for large scale potential applications in seismic-protection industri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c22b44a6ad4294d531c8aec189f86e59
https://doi.org/10.1016/j.matpr.2019.08.004

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Structural-Morphological Fluctuations Induced by Thermomechanical Treatment in a Fe – Mn – Si Shape Memory Alloy

Autor: Burak Özkal, Elena Mihalache, N. M. Lohan, Bogdan Pricop, R. I. Comăneci, Nicanor Cimpoesu, M.-G. Suru, Leandru-Gheorghe Bujoreanu

Publikováno v: Metal Science and Heat Treatment. 60:471-477

Variation of the sizes and chemical compositions of martensite plates in the structure of powder-metallurgy shape memory alloy Fe – 14 wt.% Mn – 6 wt.% Si – 9 wt.% Cr – 5 wt.% Ni is studied. Apart of the specimens is fabricated from mechanica

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a6625b2559ac34688b9efabc2054cc99
https://doi.org/10.1007/s11041-018-0303-5

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Akademický článek

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Tensile Stress-Induced Structural Changes Associated with Martensite Transformations in Fe-Mn-Si Based Shape Memory Alloys

Autor: Bogdan Pricop, Mihai Mocanu, Elena Mihalache, Burak Özkal, R. I. Comăneci, Leandru-Gheorghe Bujoreanu

Publikováno v: Materials Science Forum. 907:25-30

Tensile specimens, with the chemical composition Fe-28Mn-6Si-5Cr (mass. %), were obtained by ingot metallurgy, hot rolling, solution treatment (1100°C/ 5 min/ water) and spark erosion cutting. Tensile tests were performed to failure and to prescribe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a76b17e35c4671203ae361da3d317c39
https://doi.org/10.4028/www.scientific.net/msf.907.25

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Processing Effects on the Microstructure and Properties of Fe-Based Superelastic Alloys

Autor: Elena Mihalache, Leandru-Gheorghe Bujoreanu, Thomas Niendorf, Carmela Gurau, Gheorghe Gurau, Mihai Popa, Bogdan Pricop, Philipp Krooß, R. I. Comăneci, M. Vollmer, Nicanor Cimpoeșu, Vasile Danut Cojocaru

This study focuses on the evolution of microstructure and mechanical properties following thermomechanical processing of FeMnAlNi superelastic alloys. For Fe43.5Mn34Al15Ni7.5, which is an eligible candidate for superelastic applications, the effects

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c0c18788eed78ca06de527919ac3934e
https://doi.org/10.20944/preprints201810.0090.v1

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The Influence of α′ (bcc) Martensite on the Dynamic and Magnetic Response of Powder Metallurgy FeMnSiCrNi Shape Memory Alloys

Autor: R. I. Comăneci, Mihai Mocanu, Burak Özkal, M. Grigoraș, L. G. Bujoreanu, Bogdan Pricop, Elena Mihalache, Firuța Borza

Publikováno v: The Minerals, Metals & Materials Series ISBN: 9783319769677

In FeMnSi-based SMAs the “executive” phase is e (hexagonal close packed, hcp) stress induced martensite which retransforms to γ (face center cubic, fcc) austenite during heating, causing free-recovery shape memory effect (SME). At low Mn content

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db4944f1c384acf8697c307c3415f401
https://doi.org/10.1007/978-3-319-76968-4_16

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A Study of Martensite Formation in Powder Metallurgy Fe-Mn-Si-Cr-Ni Shape Memory Alloys

Autor: U. Söyler, R. I. Comăneci, Leandru-Gheorghe Bujoreanu, Gheorghe Gurau, N. M. Lohan, Nicanor Cimpoesu, Elena Mihalache, M.-G. Suru, Viorica Musat, Burak Özkal, Bogdan Istrate, Bogdan Pricop

Publikováno v: Materials Today: Proceedings. 2:S789-S792

Parallelepiped specimens were pressed and sintered from as-blended powders of shape memory alloy (SMA) with nominal chemical composition 66Fe-14Mn-6Si-9Cr-5Ni (mass %). Specimens were hot rolled, spark erosion cut for tensile tests, solution treated

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::745534c851ed3ba9a832027c10cd00b9
https://doi.org/10.1016/j.matpr.2015.07.400

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