Open AccessCHARACTERIZATION OF TITANIUM LASER WELDS
Author(s) -
Hana Chmelíčková,
Helena Hiklová,
Lukáš Václavek,
Jan Tomáštík,
Radim Čtvrtlík
Publication year - 2020
Publication title -
acta polytechnica ctu proceedings
Language(s) - English
Resource type - Journals
ISSN - 2336-5382
DOI - 10.14311/app.2020.27.0145
Subject(s) - materials science , penetration depth , profilometer , welding , laser , titanium , titanium alloy , penetration (warfare) , composite material , alloy , metallurgy , optics , surface finish , physics , operations research , engineering
Butt welding of commercially pure titanium Grade 1 and Ti6Al4V alloy sheets using a pulsed Nd:YAG laser KLS 246 - 102 LASAG were carried out to determine optimal values of pulse energy and pulse length to create completely penetrated weld. Surface peak power density of about 3.105 W.cm−2 was found as an optimal value. Weld dimensions, both face width and penetration depth, are found to be proportional to increasing energy and decreasing pulse length. Gentle sagging and root penetration were revealed by means of contact surface profilometry. The nanohardness tests on transverse cross-sections detected approximately 50% higher hardness in the fusion zone than in the base material.