Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Eng S Ng"'
Autor:
Eng S. Ng, Ian Watson
Publikováno v:
Journal of Laser Applications. 11:273-278
Deep penetration welding with a high power CO2 and diode laser may offer an attractive means to join metal for certain applications, for instance: welding car drive shafts and gear plant. The rapid cooling rate of laser welding results in high hardne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d08f4c2c9e2a2372eca515f6a52a4c2
https://doi.org/10.2351/1.521903
https://doi.org/10.2351/1.521903
Autor:
Eng S. Ng, Ian Watson
Publikováno v:
Journal of Laser Applications. 9:243-252
A quantitative study of the relationship between the laser process parameters and the mechanical properties of welded high carbon steels was performed utilizing a Lumonics Nd:YAG pulsed laser, operating at 1.06μm, and a robotically manipulated fiber
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a11d59b004cdce9b0fae1f6196ba7d75
https://doi.org/10.2351/1.4745466
https://doi.org/10.2351/1.4745466
Autor:
Ian Watson, Eng S. Ng
Publikováno v:
Journal of Laser Applications. 9:15-21
The welding performance of CO2 lasers is strongly affected by the clamping geometry and welding speed. Moreover, the rapid cooling rate associated with laser welding results in an untempered martensitic structure and a transverse variation in the har
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b50a12c4925cbb25deb4382022b56dbe
https://doi.org/10.2351/1.4745441
https://doi.org/10.2351/1.4745441
Publikováno v:
Conference on Lasers and Electro-Optics-Europe.
Automated laser welding can be improved by developing sensors that accurately record the weld characteristics and provide a feedback signal to control the laser output appropriately. A number of solutions to this problem have been developed [1,2]. An
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7572f2b2d8a2957b833004a727ebde6
https://doi.org/10.1364/cleo_europe.1998.cwf86
https://doi.org/10.1364/cleo_europe.1998.cwf86
Publikováno v:
International Congress on Applications of Lasers & Electro-Optics.
The combination of laser processing, different welding geometries and techniques introduces a large number of factors which potentially influence the weld quality. A multi-factorially experiment was designed to assess the effect and interactions of a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::edaaa55aedf079448685a40e15c18d8a
https://doi.org/10.2351/1.5059182
https://doi.org/10.2351/1.5059182
Autor:
Eng S. Ng, Ian A. Watson
Publikováno v:
Conference on Lasers and Electro-Optics-Europe.
The thermal cycle during laser welding of high carbon steels typically has a rapid cooling rate of about 104 K/s; in high carbon steels this results in a microstructure comprising ferrite matrix and hard martensite colonies [1,2]. Such high cooling r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::841a2957972292b847b44f755fa62ff9
https://doi.org/10.1364/cleo_europe.1998.cthh96
https://doi.org/10.1364/cleo_europe.1998.cthh96
Publikováno v:
Conference on Lasers and Electro-Optics-Europe.
Joining dissimilar metals with normal welding methods poses interesting and difficult metallurgical problems [1]. The rapid solidification rate associated with laser welding results in non-equilibrium structures due to incomplete mixing in the fusion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::999eef45547553bd583fcbedad715fdf
https://doi.org/10.1364/cleo_europe.1998.cthh95
https://doi.org/10.1364/cleo_europe.1998.cthh95
Autor:
Eng S. Ng, Ian Watson
Publikováno v:
International Congress on Applications of Lasers & Electro-Optics.
Rapid cooling associated with laser welding can lead to poor component fatigue life. In general, the cooling rate of the welding process determines the weld quality and is dependent on: the weld geometry, laser parameters, beam profile at the workpie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38587db765bfd9a2a9da93154b696507
https://doi.org/10.2351/1.5059728
https://doi.org/10.2351/1.5059728
Autor:
Eng S. Ng, Ian Watson
Publikováno v:
International Congress on Applications of Lasers & Electro-Optics.
Greater understanding of the basic phenomena of laser welding and better control of the process is leading to improved weld quality. Because of the complexities of accurate modelling it is beneficial to examine the interaction and effects of paramete
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dec5495f82039eb8b2226da7d0a0df2d
https://doi.org/10.2351/1.5059053
https://doi.org/10.2351/1.5059053
Publikováno v:
Conference on Lasers and Electro-Optics Europe.
Due to the low integrated energy input, laser welds are often quenched too rapidly in the fusion region [1]; this results in an untempered martensitic structure in samples with sufficient alloy content to retard formation of ferrite, pearlite and bai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a19e92efc2acdc0f4bbeb253160e90e6
https://doi.org/10.1364/cleo_europe.1996.cthe3
https://doi.org/10.1364/cleo_europe.1996.cthe3