title: Distortion of laser welded titanium plates.
abstract: The distortion of laser welded titanium plates was assessed for different operating conditions of the laser welding device, and with different welding parameters (in terms of weld point and prewelding). In this study, Nd : YAG laser welding device was used to join the titanium plates. The results showed that distortion increased stepwise after each welding point along the welding zone (one-side welding), but decreased consecutively as the welding proceeded on the second side of the weld (two-side welding). In the case of one-side welding, the dependence of distortion on current and spot diameter presented maxima--due to changes in the welding pool characteristics. For two-side weld the same parameters exercised little influence on its distortion recovery, due to the effect of solidified weld pools from the first side. Current and spot diameter determined the weld pool, which in turn regulated distortion based on shrinkage. Four-point prewelding significantly decreased the final distortion for both one- and two-side welds. Alternating two-side welding of prewelded assembly showed lower distortion than a classic two-side weld.
authors.affiliation: Biomedical, Dental Materials and Engineering, Division of Oral Health Science, Course of Oral Medical Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7, Kita-ku, Sapporo, 060-8586, Japan. keiji-iwasaki@nifty.com
authors.forename: Keiji
authors.initials: K
authors.lastname: Iwasaki
authors.forename: Shoji
authors.initials: S
authors.lastname: Ohkawa
authors.forename: Iosif D
authors.initials: ID
authors.lastname: Rosca
authors.forename: Motohiro
authors.initials: M
authors.lastname: Uo
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Akasaka
authors.forename: Fumio
authors.initials: F
authors.lastname: Watari
mesh_terms: D012994:Dental Soldering; D003799:Dental Stress Analysis; D006358:Hot Temperature; D007834:Lasers; D008669:Metallurgy; D013314:Stress, Mechanical; D014025:Titanium; D014896:Welding
chemical_list: D014025:Titanium