Abstract: An austenitic alloy based on nickel, chromium and iron, and having a high aluminum content, intended for use at a given operating temperature (Ts) between 900° C. and 1200° C., the alloy comprising the following elements, in weight percent: chromium between 20% and 32%, nickel between 30% and 60%, aluminum between 3.5% and 6%, carbon between 0.4% and 0.7%, titanium between 0.05% and 0.3%, niobium and/or tantalum between 0.6% and 2%, an element, composed of at least one rare earth and/or hafnium, between 0.002% and 0.1%, silicon between 0 and 0.5%, manganese between 0 and 0.5%, tungsten between 0 and 2%, and iron as the balance of the elements in the alloy. The alloy has less than 1% by volume of an intermetallic B2-NiAl phase and less than 1% by volume of an alpha prime phase rich in chromium, after subjecting the alloy to an operating temperature (Ts).
Type:
Grant
Filed:
June 7, 2019
Date of Patent:
August 9, 2022
Assignees:
Manoir Pitres, Université de Rouen Normandie, Centre National de la Recherche Scientifique, Institut National des Sciences Appliquées Rouen Normandie
Inventors:
Mathieu Couvrat, Antoine Facco, Cristelle Pareige
Abstract: A laser source for emitting a group of pulses, includes a primary laser source suitable for emitting at least one primary laser pulse; at least one interferometer suitable for forming, from the primary laser pulse, a plurality of secondary laser pulses, each interferometer comprising at least one delay line allowing two secondary laser pulses to be temporally separated, by a delay comprised between 50 ps and 10 ns; and a single-mode amplifying optical fiber intended to receive the secondary laser pulses, in order to form as output a group of spatially superposed pulses.
Type:
Grant
Filed:
February 27, 2018
Date of Patent:
December 29, 2020
Assignees:
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, INSTITUT NATIONAL DES SCIENCES APPLIQUEES-ROUEN, UNIVERSITE DE ROUEN NORMANDIE
Inventors:
Ammar Hideur, Adil Haboucha, Arnaud Bultel, Said Idlahcen, Thomas Godin
Abstract: An austenitic alloy based on nickel, chromium and iron, and having a high aluminum content, intended for use at a given operating temperature (Ts) between 900° C. and 1200° C., the alloy comprising the following elements, in weight percent: chromium between 20% and 32%, nickel between 30% and 60%, aluminum between 3.5% and 6%, carbon between 0.4% and 0.7%, titanium between 0.05% and 0.3%, niobium and/or tantalum between 0.6% and 2%, an element, composed of at least one rare earth and/or hafnium, between 0.002% and 0.1%, silicon between 0 and 0.5%, manganese between 0 and 0.5%, tungsten between 0 and 2%, and iron as the balance of the elements in the alloy. The alloy has less than 1% by volume of an intermetallic B2-NiAl phase and less than 1% by volume of an alpha prime phase rich in chromium, after subjecting the alloy to an operating temperature (Ts).
Type:
Application
Filed:
June 7, 2019
Publication date:
December 12, 2019
Applicants:
Manoir Pitres, Institut National des Sciences Appliquées Rouen Normandie, Université de Rouen Normandie, Centre National de la Recherche Scientifique, Institut National des Sciences Appliquées Rouen Normandie
Inventors:
Mathieu Couvrat, Antoine Facco, Cristelle Pareige