Conduction mode laser welding with beam shaping using a deformable mirror

This study explores the possibility of tailoring the fusion zone in conduction mode laser welding using a deformable mirror for beam shaping of multi-kilowatt continuous wave laser sources. Three power density distributions were shaped and used in bead on plate welding of Ti64 plates in conduction mode at three travel speeds. The effect on melt pool free surface geometry, cross section, microstructure and hardness profiles was measured and studied. It is shown that the geometry of the melt pool can be modified using a deformable mirror. A narrower and longer melt pool or a wider, shorter and shallower one were indeed obtained forming Gaussian-elliptical power density distributions oriented along and transverse to the travel direction, respectively. The latter distribution could be a favourable option for laser beam additive manufacturing as it could improve process efficiency while reducing remelting of the previous layer. This system has also a promising potential for adaptive process control since it could change fundamentally the beam shape at a rate faster than 10 ms.

TEKNIK OCH TEKNOLOGIER Materialteknik Bearbetnings-, yt- och fogningsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Manufacturing, Surface and Joining Technology hsv//eng
Adaptive control systems; Continuous wave lasers; Deformation; Gaussian beams; Lakes; Laser beam welding; Laser beams; Laser mirrors; Microstructure
Beam-shaping; Conduction mode; Conduction mode laser welding; Conduction mode welding; Deformable mirrors; Fusion zone geometry; Fusion zones; Melt pool; Melt pool geometry; Power density distributions
Geometry
Production Technology
Produktionsteknik

Mahade, Satyapal,1987-Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW(Swepub:hv)satmah (author)
Sikström, Fredrik,1971-Högskolan Väst,Avdelningen för produktionssystem (PS),PTW(Swepub:hv)fsi (author)
Choquet, Isabelle,1965-Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW(Swepub:hv)tic (author)
Joshi, Shrikant V.,1960-Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW(Swepub:hv)shrjos (author)
Ancona, Antonio,1974-Högskolan Väst,Avdelningen för produktionssystem (PS),Physics Department, University of Bari, Bari (ITA),PTW(Swepub:hv)antanc (author)
Högskolan VästAvdelningen för produktionssystem (PS) (creator_code:org_t)

By the author/editor: Mi, Yongcui, 198 ...; Mahade, Satyapal ...; Sikström, Fredri ...; Choquet, Isabell ...; Joshi, Shrikant ...; Ancona, Antonio, ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Manufacturing Su ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.