Effect of Current Waveforms during Directed Energy Deposition of 4043 Aluminum Alloy on Microstructure, Hardness, and Wear of Alloy

被引：7

作者：

Ujjwal, Kumar ^{[1
]}

Kumar, Katipalli Anand ^{[1
]}

Anand, Mukul ^{[1
]}

Raman, R. K. Singh ^{[2
,3
]}

Das, Alok Kumar ^{[1
]}

机构：

[1] Indian Inst Technol ISM, Dept Mech Engn, Dhanbad 826004, Jharkhand, India

[2] Monash Univ, Dept Mech & Aerosp Engn, Clayton, Vic 3800, Australia

[3] Monash Univ, Dept Chem & Biol Engn, Clayton, Vic 3800, Australia

来源：

MATERIALS | 2023年 / 16卷 / 20期

关键词：

wire arc additive manufacturing; aluminum alloy; waveforms; microstructure;

D O I：

10.3390/ma16206716

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Wire arc additive manufacturing (WAAM) was employed to fabricate 4043 aluminum alloy walls. To investigate the effects of sinusoidal, triangular, and rectangular waveforms of alternating current (AC) and their transients on the wall geometry, microstructure evolution, hardness, and wear properties were evaluated. The root mean square (RMS) current value was maximum for the rectangular and minimum for the triangular waveform. The section produced by the triangular waveform had the highest height-to-width ratio, indicating that this waveform can be a favorable choice for creating components using WAAM. The optical micrographs of the transverse cross-section of the printed sections revealed the grain structure produced with this waveform to be heterogeneous, having a columnar dendritic structure at the bottom and equiaxed at the top portion. The waveforms also had an impact on the hardness and wear characteristics of all the walls, which were attributed to their cooling rate.

引用

页数：14

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