Experimental investigations for a postweld heat treatment on Ti-6Al-4V titanium welds with a defocused laser beam

Autor: Jean-Denis Béguin, Eric Andrieu, Y. Balcaen, Joël Alexis

Publikováno v: MATEC Web of Conferences, Vol 321, p 11034 (2020)

The purpose of this study is to apply a local heat treatment (LHT), in-situ, on the weld bead, using a defocused Yb: YAG laser beam on a continuous regime, in order to reduce residual stresses and decompose the brittle a’ martensite, into a lamella

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d66b0e152fd8899801d85e69f8b1b7d3
https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_11034.pdf

Yb: YAG laser welding of Ti6Al4V sheet using conventional and annular power density distribution: microstructure mechanical properties relationship

Autor: V. Gazagne, Jean-Denis Béguin, Eric Andrieu, Joël Alexis, Y. Balcaen

Publikováno v: MATEC Web of Conferences, Vol 321, p 11061 (2020)

Development of high power laser beams with increasing beam quality and decreasing purchase cost lead to a strong development of laser welding techniques. Narrow weld beads, high welding speed, and low heat input are the main advantages of this reliab

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5cae0a94b0e79efb137fe16a69288a81
https://doi.org/10.1051/matecconf/202032111061

Mechanical and barrier properties of MOCVD processed alumina coatings on Ti6Al4V titanium alloy

Autor: Yannick Balcaen, Loïc Lacroix, Nicoleta Radutoiu, Constantin Vahlas, Jean-Denis Béguin, Joël Alexis, Diane Samélor

Publikováno v: Surface and Coatings Technology
Surface and Coatings Technology, Elsevier, 2011, vol. 206, pp. 1684-1690. ⟨10.1016/j.surfcoat.2011.09.056⟩

International audience; This study focuses on the implementation of different aluminum oxide coatings processed by metal-organic chemical vapor deposition from aluminum tri-isopropoxide on commercial Ti6Al4V titanium alloy to improve its high tempera

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::575065b32a282756dc0c61deecc1d70c
https://oatao.univ-toulouse.fr/5626/

Structure, morphology and mechanical properties of electrodeposited composite coatings Ni–P/SiC

Autor: Joël Alexis, Jean-Pierre Bonino, Bernard Etcheverry, Jean-Denis Béguin

Publikováno v: Materials Chemistry and Physics
Materials Chemistry and Physics, Elsevier, 2010, vol. 120, pp. 244-250. ⟨10.1016/j.matchemphys.2009.12.013⟩

International audience; Physical properties of the NiP/SiC deposits are discussed according to the electroplating parameters and heat treatments. The insertion of silicon carbide in the coatings does not modify their rigidity (E = 230 GPa), increases

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c101aad81899c818d73cf4fb2968b3fb
https://hal.archives-ouvertes.fr/hal-00760126/file/Alexis_6487.pdf

Weldability of the superalloys Haynes 188 and Hastelloy X by Nd:YAG

Autor: Jérémie Graneix, Talal Masri, Jean-Denis Béguin, Joël Alexis, François Pardheillan

Publikováno v: MATEC Web of Conferences, Vol 14, p 13006 (2014)

The requirements for welded aircraft parts have become increasingly severe, especially in terms of the reproducibility of the geometry and metallurgical grade of the weld bead. Laser welding is a viable method of assembly to meet these new demands, b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::305ebd12aeb550be6711e76679d20a10
https://doi.org/10.1051/matecconf/20141413006