Effect of Pulse Laser Welding Parameters and Filler Metal on Microstructure and Mechanical Properties of Al-4.7Mg-0.32Mn-0.21Sc-0.1Zr Alloy
The effect of pulse laser welding parameters and filler metal on microstructure and mechanical properties of the new heat-treatable, wieldable, cryogenic Al-4.7Mg-0.32Mn-0.21Sc-0.1Zr alloy were investigated. The optimum parameters of pulsed laser welding were found. They were 330–340 V in voltage, 0...
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doaj-796d287da64c4b68847fdbdc829f869d2020-11-25T01:47:05ZengMDPI AGMetals2075-47012017-12-0171256410.3390/met7120564met7120564Effect of Pulse Laser Welding Parameters and Filler Metal on Microstructure and Mechanical Properties of Al-4.7Mg-0.32Mn-0.21Sc-0.1Zr AlloyIrina Loginova0Asmaa Khalil1Andrey Pozdniakov2Alexey Solonin3Vadim Zolotorevskiy4Department of Physical Metallurgy of Non-Ferrous Metals, National University of Science and Technology MISiS, Moscow 119049, RussiaDepartment of Physical Metallurgy of Non-Ferrous Metals, National University of Science and Technology MISiS, Moscow 119049, RussiaDepartment of Physical Metallurgy of Non-Ferrous Metals, National University of Science and Technology MISiS, Moscow 119049, RussiaDepartment of Physical Metallurgy of Non-Ferrous Metals, National University of Science and Technology MISiS, Moscow 119049, RussiaDepartment of Physical Metallurgy of Non-Ferrous Metals, National University of Science and Technology MISiS, Moscow 119049, RussiaThe effect of pulse laser welding parameters and filler metal on microstructure and mechanical properties of the new heat-treatable, wieldable, cryogenic Al-4.7Mg-0.32Mn-0.21Sc-0.1Zr alloy were investigated. The optimum parameters of pulsed laser welding were found. They were 330–340 V in voltage, 0.2–0.25 mm in pulse overlap with 12 ms duration, and 2 mm/s speed and ramp-down pulse shape. Pulsed laser welding without and with Al-5Mg filler metal led to the formation of duplex (columnar and fine grains) as-cast structures with hot cracks and gas porosity as defects in the weld zone. Using Al-5Ti-1B filler metal for welding led to the formation of the fine grain structure with an average grain size of 4 ± 0.2 µm and without any weld defects. The average concentration of Mg is 2.8%; Mn, 0.2%; Zr, 0.1%; Sc, 0.15%; and Ti, 2.1% were formed in the weld. The ultimate tensile strength (UTS) of the welded alloy with AlTiB was 260 MPa, which was equal to the base metal in the as-cast condition. The UTS was increased by 60 MPa after annealing at 370 °C for 6 h that was 85% of UTS of the base alloy.https://www.mdpi.com/2075-4701/7/12/564aluminum alloyselectron microscopystress/strain measurementslaser methodsgrains and interfaces |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Irina Loginova Asmaa Khalil Andrey Pozdniakov Alexey Solonin Vadim Zolotorevskiy |
spellingShingle |
Irina Loginova Asmaa Khalil Andrey Pozdniakov Alexey Solonin Vadim Zolotorevskiy Effect of Pulse Laser Welding Parameters and Filler Metal on Microstructure and Mechanical Properties of Al-4.7Mg-0.32Mn-0.21Sc-0.1Zr Alloy Metals aluminum alloys electron microscopy stress/strain measurements laser methods grains and interfaces |
author_facet |
Irina Loginova Asmaa Khalil Andrey Pozdniakov Alexey Solonin Vadim Zolotorevskiy |
author_sort |
Irina Loginova |
title |
Effect of Pulse Laser Welding Parameters and Filler Metal on Microstructure and Mechanical Properties of Al-4.7Mg-0.32Mn-0.21Sc-0.1Zr Alloy |
title_short |
Effect of Pulse Laser Welding Parameters and Filler Metal on Microstructure and Mechanical Properties of Al-4.7Mg-0.32Mn-0.21Sc-0.1Zr Alloy |
title_full |
Effect of Pulse Laser Welding Parameters and Filler Metal on Microstructure and Mechanical Properties of Al-4.7Mg-0.32Mn-0.21Sc-0.1Zr Alloy |
title_fullStr |
Effect of Pulse Laser Welding Parameters and Filler Metal on Microstructure and Mechanical Properties of Al-4.7Mg-0.32Mn-0.21Sc-0.1Zr Alloy |
title_full_unstemmed |
Effect of Pulse Laser Welding Parameters and Filler Metal on Microstructure and Mechanical Properties of Al-4.7Mg-0.32Mn-0.21Sc-0.1Zr Alloy |
title_sort |
effect of pulse laser welding parameters and filler metal on microstructure and mechanical properties of al-4.7mg-0.32mn-0.21sc-0.1zr alloy |
publisher |
MDPI AG |
series |
Metals |
issn |
2075-4701 |
publishDate |
2017-12-01 |
description |
The effect of pulse laser welding parameters and filler metal on microstructure and mechanical properties of the new heat-treatable, wieldable, cryogenic Al-4.7Mg-0.32Mn-0.21Sc-0.1Zr alloy were investigated. The optimum parameters of pulsed laser welding were found. They were 330–340 V in voltage, 0.2–0.25 mm in pulse overlap with 12 ms duration, and 2 mm/s speed and ramp-down pulse shape. Pulsed laser welding without and with Al-5Mg filler metal led to the formation of duplex (columnar and fine grains) as-cast structures with hot cracks and gas porosity as defects in the weld zone. Using Al-5Ti-1B filler metal for welding led to the formation of the fine grain structure with an average grain size of 4 ± 0.2 µm and without any weld defects. The average concentration of Mg is 2.8%; Mn, 0.2%; Zr, 0.1%; Sc, 0.15%; and Ti, 2.1% were formed in the weld. The ultimate tensile strength (UTS) of the welded alloy with AlTiB was 260 MPa, which was equal to the base metal in the as-cast condition. The UTS was increased by 60 MPa after annealing at 370 °C for 6 h that was 85% of UTS of the base alloy. |
topic |
aluminum alloys electron microscopy stress/strain measurements laser methods grains and interfaces |
url |
https://www.mdpi.com/2075-4701/7/12/564 |
work_keys_str_mv |
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