Initial weldability study on Al0.5CrCoCu0.1FeNi high-entropy alloy

Martin, Alexander C.; Fink, Carolin

doi:10.1007/s40194-019-00702-7

Cited by 28 publications

(12 citation statements)

References 18 publications

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“…Evidently, the yield strength (σy) of each weldment has been remarkably enhanced and the maximum value can be reached for W2 (330.5 MPa) ( Figure 5a and Table S1 in Supplementary Materials). However, as reported in previous works of the laser welding of alloys, the ultimate tensile strength (σUTS) indicates a reduction with regard to the base materials, 75% of retention (σUTS(weld)/σUTS(base)) is a preferable outcome [22,23] and the retention for HEAs is lower than other alloys [6,14,24]. The σUTS of W1, W2 and W3 reaches 87.8%, 88.5% and 81.7% when referring to the base.…”

Section: Resultsmentioning

confidence: 63%

Laser Beam Welding of Feconicrmn High-Entropy Alloys with Preplaced Powders

Zhou

Zheng

et al. 2020

Metals

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In this paper, as-annealed FeCoNiCrMn plates were laser-welded with preplaced FeCoNiCrMn and FeCoNiCrAl powders, respectively. The grains in the fusion zone of the weld with FeCoNiCrMn powder have a reduced aspect ratio compared to those without preplaced powders and the weld with FeCoNiCrAl powder presents relative equiaxed grains. The yield strength of each weld has been remarkably enhanced when referring to the base alloy, and the ultimate tensile strength of each weld with preplaced powder exceeds 80% of that of the base and the maximum reaches 88.5% when referring to the weld with preplaced FeCoNiCrMn powder. Cleavage fractography was observed in the welds. The finding of this work will service the engineering practices of high-entropy alloys.

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Section: Resultsmentioning

confidence: 63%

Laser Beam Welding of Feconicrmn High-Entropy Alloys with Preplaced Powders

Zhou

Zheng

et al. 2020

Metals

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“…The obtained results demonstrate for the first time the possibility to produce sound butt joints of the Ti 1.89 NbCrV 0.56 RHEA by LBW, which is an important step toward potential practical applications of this new class of metallic alloys. However, the present study also emphasized the importance of LBW process parameters (particularly pre-heating temperature) to obtain good results, which is quite different from the transition metals HEAs [27][28][29][30][31][32]44,45]. Given the wide range of the available RHEAs compositions [7], specific attention should be paid to select proper welding conditions for each individual alloy.…”

Section: Resultsmentioning

confidence: 84%

Laser Beam Welding of a Low Density Refractory High Entropy Alloy

Panina

Yurchenko

Zherebtsov

et al. 2019

Metals

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The effect of laser beam welding on the structure and properties of a Ti1.89NbCrV0.56 refractory high entropy alloy was studied. In particular, the effect of different pre-heating temperatures was examined. Due to the low ductility of the material, laser beam welding at room temperature resulted in the formations of hot cracks. Sound butt joints without cracks were produced using pre-heating to T ≥ 600 °C. In the initial as-cast condition, the alloy consisted of coarse bcc grains with a small amount of lens-shaped C15 Laves phase particles. A columnar microstructure was formed in the welds; the thickness of the grains increased with the temperature of pre-heating before welding. The Laves phase particles were formed in the seams after welding at 600 °C or 800 °C, however, these particles were not observed after welding at room temperature or at 400 °C. Soaking at elevated temperatures did not change the microstructure of the base material considerably, however, “additional” small Laves particles formed at 600 °C or 800 °C. Tensile test of welded specimens performed at 750 °C resulted in the fracture of the base material because of the higher hardness of the welds. The latter can be associated with the bcc grains refinement in the seams.

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“…There are further studies on welding of HEAs/CCAs by special processes such as explosion welding [35], diffusion welding [36], and individual examinations on refractory HEAs [37]. These investigations will not be discussed in the following, as this overview focuses on basic welding properties of the equiatomic CoCrFeMnNi HEA ("Cantor" alloy in accordance with [6]) and various compositions of the Al x CoCrCu y FeNi (with 0 ≤ x ≤ 1 and 0 ≤ y ≤ 1) HEAs/ CCAs [38][39][40].…”

Section: Hea Typesmentioning

confidence: 99%

Welding of high-entropy alloys and compositionally complex alloys—an overview

et al. 2021

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High-entropy alloys (HEAs) and compositionally complex alloys (CCAs) represent new classes of materials containing five or more alloying elements (concentration of each element ranging from 5 to 35 at. %). In the present study, HEAs are defined as single-phase solid solutions; CCAs contain at least two phases. The alloy concept of HEAs/CCAs is fundamentally different from most conventional alloys and promises interesting properties for industrial applications (e.g., to overcome the strength-ductility trade-off). To date, little attention has been paid to the weldability of HEAs/CCAs encompassing effects on the welding metallurgy. It remains open whether welding of HEAs/CCAs may lead to the formation of brittle intermetallics and promote elemental segregation at crystalline defects. The effect on the weld joint properties (strength, corrosion resistance) must be investigated. The weld metal and heat-affected zone in conventional alloys are characterized by non-equilibrium microstructural evolutions that most probably occur in HEAs/CCAs. The corresponding weldability has not yet been studied in detail in the literature, and the existing information is not documented in a comprehensive way. Therefore, this study summarizes the most important results on the welding of HEAs/CCAs and their weld joint properties, classified by HEA/CCA type (focused on CoCrFeMnNi and AlxCoCrCuyFeNi system) and welding process.

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Initial weldability study on Al0.5CrCoCu0.1FeNi high-entropy alloy

Cited by 28 publications

References 18 publications

Laser Beam Welding of Feconicrmn High-Entropy Alloys with Preplaced Powders

Laser Beam Welding of Feconicrmn High-Entropy Alloys with Preplaced Powders

Laser Beam Welding of a Low Density Refractory High Entropy Alloy

Welding of high-entropy alloys and compositionally complex alloys—an overview

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