Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Leandru-Gheorghe BUJOREANU"'
Autor:
Adrian Petru Teodoriu, Bogdan Pricop, Nicoleta-Monica Lohan, Mihai Popa, Radu Ioachim Comăneci, Ioan Doroftei, Leandru-Gheorghe Bujoreanu
Publikováno v:
Actuators, Vol 13, Iss 8, p 319 (2024)
In the present study, the capacity of two commercial NiTi and NiTiCu shape memory alloy (SMA) wires to develop work-generating (WG) and constrained-recovery (CR) shape memory effects (SMEs), as well as the capacity of a commercial NiTiFe super-elasti
Externí odkaz:
https://doaj.org/article/5a025a748c7a403790e46f7062f06860
Autor:
Ștefan-Dumitru Sava, Bogdan Pricop, Radu-Ioachim Comăneci, Nicanor Cimpoeșu, Mihai Popa, Nicoleta-Monica Lohan, Leandru-Gheorghe Bujoreanu
Publikováno v:
Polymers, Vol 16, Iss 14, p 1965 (2024)
One of the useful features of 3D-printed specimens of recycled polyethylene terephthalate glycol (R-PETG) is the ability to repetitively develop free recovery as well as the work-generating, shape-memory effect. This behavior is enabled by the R-PETG
Externí odkaz:
https://doaj.org/article/016f119602df43bf85be7f56f4d215df
Autor:
Gheorghe Bădărău, Mihai Popa, George Stoian, Ana-Maria Roman, Radu-Ioachim Comăneci, Bogdan Pricop, Nicanor Cimpoeșu, Leandru-Gheorghe Bujoreanu
Publikováno v:
Crystals, Vol 14, Iss 3, p 250 (2024)
The paper analyzes the occurrence of evenly spaced cracks on the surface of lamellar specimens of Fe-28Mn-6Si-5Cr (mass %) shape-memory alloy (SMA), during cold rolling. The specimens were hot rolled and normalized and developed cold rolling cracks w
Externí odkaz:
https://doaj.org/article/9056734eb7b54dd9aa64ccedd9186afc
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 44, Iss 3, Pp 5-11 (2021)
This paper presents the results of an original experimental study on the training capacity of a powder metallurgy (PM) FeMnSiCrNi shape memory alloy (SMA). The specimens were sintered under protective atmosphere from blended elemental powders, 50 vol
Externí odkaz:
https://doaj.org/article/b320a5cefc994301805e68049f7a1f00
Autor:
Ana-Maria Roman, Ramona Cimpoeșu, Bogdan Pricop, Nicoleta-Monica Lohan, Marius Mihai Cazacu, Leandru-Gheorghe Bujoreanu, Cătălin Panaghie, Georgeta Zegan, Nicanor Cimpoeșu, Alice Mirela Murariu
Publikováno v:
Journal of Functional Biomaterials, Vol 14, Iss 7, p 377 (2023)
Iron-based SMAs can be used in the medical field for both their shape memory effect (SME) and biodegradability after a specific period, solving complicated chirurgical problems that are partially now addressed with shape-memory polymers or biodegrada
Externí odkaz:
https://doaj.org/article/436b861720ea4d769809da0d36c06c04
Autor:
Ștefan-Dumitru Sava, Nicoleta-Monica Lohan, Bogdan Pricop, Mihai Popa, Nicanor Cimpoeșu, Radu-Ioachim Comăneci, Leandru-Gheorghe Bujoreanu
Publikováno v:
Polymers, Vol 15, Iss 10, p 2378 (2023)
From commercial pellets of recycled polyethylene terephthalate glycol (R-PETG), 1.75 mm diameter filaments for 3D printing were produced. By varying the filament’s deposition direction between 10° and 40° to the transversal axis, parallelepiped s
Externí odkaz:
https://doaj.org/article/3628bccc477f47a3b5fddc4c3a52a68e
Autor:
Mihai Popa, Florin Popa, Bogdan Pricop, Nicanor Cimpoeșu, Nicoleta-Monica Lohan, Gabriel Kicsi, Bogdan Istrate, Leandru-Gheorghe Bujoreanu
Publikováno v:
Nanomaterials, Vol 13, Iss 7, p 1250 (2023)
Fe-Mn-Si-based shape memory alloys (SMAs) have been extensively investigated since 1982 for various useful properties that enhance the development of different applications such as anti-seismic dampers for very tall buildings, pipe joints, or rail fa
Externí odkaz:
https://doaj.org/article/7eea6ab5a9e84a3ca10735d5d834fe06
Autor:
George-Theodor Stiubianu, Adrian Bele, Marian Grigoras, Codrin Tugui, Bianca-Iulia Ciubotaru, Mirela-Fernanda Zaltariov, Firuța Borza, Leandru-Gheorghe Bujoreanu, Maria Cazacu
Publikováno v:
Batteries, Vol 8, Iss 8, p 95 (2022)
Hexagonal boron nitride (hBN) has been incorporated, as an active filler, in a customized silicone matrix to obtain high thermal conductivity composites, maintaining high flexibility and low dielectric permittivity, which are of interest for heat dis
Externí odkaz:
https://doaj.org/article/2c1acf36cece4ae093014430131150f9
Publikováno v:
Nanomaterials, Vol 12, Iss 14, p 2342 (2022)
A sudden increase in storage modulus (ΔE′) was repeatedly recorded during the heating of powder metallurgy (PM) 66Fe-14Mn-6Si-9Cr-5Ni (mass. %) shape memory alloy specimens subjected to dynamic mechanical analysis (DMA), under constant applied str
Externí odkaz:
https://doaj.org/article/bdf541e04a2f460c92a187dbdb956c10
Autor:
Mihai Popa, Nicoleta-Monica Lohan, Bogdan Pricop, Nicanor Cimpoeșu, Marieta Porcescu, Radu Ioachim Comăneci, Maria Cazacu, Firuța Borza, Leandru-Gheorghe Bujoreanu
Publikováno v:
Nanomaterials, Vol 12, Iss 12, p 2088 (2022)
Active elements made of Ti50Ni45Cu5 shape memory alloy (SMA) were martensitic at room temperature (RT) after hot rolling with instant water quenching. These pristine specimens were subjected to two thermomechanical training procedures consisting of (
Externí odkaz:
https://doaj.org/article/9036812cc30f493ca1058adbf231e919