Pub­li­ca­tions

Influ­ence of Full Pen­e­tra­tion Weld­ing on the Mul­ti­spec­tral Sig­nal of the Process Radi­a­tion dur­ing Laser Beam Weld­ing of Austenitic Stain­less Steel

Patrick Mey­er, Chris­t­ian Schu­mann, Dario Spatzek, André Häusler; 13th CIRP Con­fer­ence on Pho­ton­ic Tech­nolo­gies [LANE 2024]

Descrip­tion
A 100% visu­al inspec­tion of the welds car­ried out is not always pos­si­ble for eco­nom­ic rea­sons. Dif­fer­ent meth­ods of process mon­i­tor­ing are there­fore used for non-destruc­tive test­ing of process and weld seam qual­i­ty. In the fol­low­ing, the record­ed mul­ti­spec­tral sig­nals of the reflec­tive process radi­a­tion are eval­u­at­ed using descrip­tive sta­tis­tics and char­ac­ter­is­tics of a full pen­e­tra­tion weld dur­ing laser beam weld­ing of austenitic stain­less steel are worked out. The aim is to detect and local­ize unin­ten­tion­al full pen­e­tra­tion weld­ing at an ear­ly stage and thus avoid rejects. For this pur­pose, adapt­ed sam­ple geome­tries with vary­ing mate­r­i­al thick­ness­es are pre­pared for the test series. As a result, the need to vary the weld­ing process para­me­ters to achieve the dif­fer­ent weld­ing states (full and par­tial pen­e­tra­tion weld) is avoid­ed. By eval­u­at­ing the mea­sured val­ues of the wave­length-selec­tive sig­nals, a sig­nif­i­cant influ­ence on the sig­nal inten­si­ty and the sig­nal fre­quen­cy could be confirmed.

Part­ners
> Fraun­hofer Insti­tute for Laser Tech­nol­o­gy ILT