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Nd:YAG Laser Welding of Ti6-Al-4V: Mechanical and Metallurgical Properties
Malayer Univ, Dept Mech Engn, Fac Engn, Malayer, Iran. Malayer Univ, Laser Mat Proc Res Ctr, Malayer, Iran.
KNToosi Univ Technol, Dept Mech Engn, Tehran, Iran.
Shahid Rajaee Teacher Training Univ, Tehran, Iran .
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0003-0194-9018
2019 (English)In: Lasers in engineering (Print), ISSN 0898-1507, E-ISSN 1029-029X, Vol. 43, no 1-2, p. 21-33Article in journal (Refereed) Published
Abstract [en]

Titanium and their alloys have high strength to weight ratio, good corrosion resistance and high melting point temperature lead to their application in engineering. Ti-6Al-4V alloy has been widely used in medical, chemistry and aerospace industries. In this research, laser welding of Ti-6Al-4V sheet with the thickness of 1.7 mm performed using a 400 W pulsed Nd:YAG laser. The effects of laser peak power, pulse duration and laser pulse energy on the weld bead profile, weld microhardness, tensile strength and microstructure were studied. Results showed that by increasing laser peak power, decreasing pulse duration and increasing laser pulse energy, the weld penetration increases. Metallurgical observations revealed that welded zone comprises of acicular αˊ phase within prior coarse β grains. Microhardness distribution is more uniform in welded zone. The microhardness value in the welded zone is the highest which is attributed to high martensitic phase content in the welded zone. The ultimate tensile strength (UTS) values show the variation from 649 to 998 MPa in the Nd:YAG laser welded samples.

Place, publisher, year, edition, pages
Old City Publishing, 2019. Vol. 43, no 1-2, p. 21-33
Keywords [en]
Nd:YAG laser, Ti-6Al-4V alloy, laser welding, pulsed, welding parameters, microstructure, mechanical properties
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-75179ISI: 000470835800003OAI: oai:DiVA.org:ltu-75179DiVA, id: diva2:1333632
Note

Validerad;2019;Nivå 2;2019-07-01 (johcin)

Available from: 2019-07-01 Created: 2019-07-01 Last updated: 2019-07-01Bibliographically approved

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https://www.oldcitypublishing.com/journals/lie-home/lie-issue-contents/lie-volume-43-number-1-3-2019/lie-43-1-3-p-21-33/

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Volpp, Joerg

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