The grain structure of a weld results from the solidification rate and the temperature gradient during solidification. These variables are directly affected by the heat input and the feed rate of the welding process. A synchronized modulation of laser power, welding velocity and beam diameter during welding was applied. This process strategy leads to a periodical change of the solidification rate and temperature gradient. The resulting weld shows a continuous change of the type of grain structure over the welded length. The local grain structure varies strongly. This inhibits the propagation of a centerline hot crack. The metallographic analysis in shows the interruption of centerline cracks at local changes of the grain structure.
%0 Generic
%1 hagenlocher2018active
%A Hagenlocher, Christian
%A Seibold, Marc
%A Weber, Rudolf
%A Graf, Thomas
%D 2018
%K myown welding laser from:c_hagenlocher
%T Active Grain Structure Modulation during Laser Beam Welding
%X The grain structure of a weld results from the solidification rate and the temperature gradient during solidification. These variables are directly affected by the heat input and the feed rate of the welding process. A synchronized modulation of laser power, welding velocity and beam diameter during welding was applied. This process strategy leads to a periodical change of the solidification rate and temperature gradient. The resulting weld shows a continuous change of the type of grain structure over the welded length. The local grain structure varies strongly. This inhibits the propagation of a centerline hot crack. The metallographic analysis in shows the interruption of centerline cracks at local changes of the grain structure.
@presentation{hagenlocher2018active,
abstract = {The grain structure of a weld results from the solidification rate and the temperature gradient during solidification. These variables are directly affected by the heat input and the feed rate of the welding process. A synchronized modulation of laser power, welding velocity and beam diameter during welding was applied. This process strategy leads to a periodical change of the solidification rate and temperature gradient. The resulting weld shows a continuous change of the type of grain structure over the welded length. The local grain structure varies strongly. This inhibits the propagation of a centerline hot crack. The metallographic analysis in shows the interruption of centerline cracks at local changes of the grain structure.},
added-at = {2018-09-17T08:19:20.000+0200},
author = {Hagenlocher, Christian and Seibold, Marc and Weber, Rudolf and Graf, Thomas},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2915a9771ff77db6667a5bf547dccaf48/ifsw},
eventdate = {05.06.2018},
eventtitle = {SLT2018 - Stuttgarter Lasertage},
interhash = {196d8fd2e169ad0a7c138cd0fa480758},
intrahash = {915a9771ff77db6667a5bf547dccaf48},
keywords = {myown welding laser from:c_hagenlocher},
timestamp = {2018-09-17T06:19:20.000+0200},
title = {Active Grain Structure Modulation during Laser Beam Welding},
year = 2018
}
