Mechanical and Corrosion Properties of Additively Manufactured CoCrFeMnNi High Entropy Alloy

Carroll, Jay; Whetten, Shaun R; Esmaeely, Saba Navabzadeh; Locke, Jenifer; White, Emma; Anderson, Iver E.; Chandross, Michael; Michael, Joseph R.; Argibay, Nicolas; Schindelholz, Eric John; Kustas, Andrew B.

doi:10.1016/j.addma.2019.100833

Cited by 49 publications

(39 citation statements)

References 96 publications

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“…The observed selective attack of the segregated inter-cellular regions could be attributed to the segregation of Mn along the walls of cellular structures. The corrosion potential of Mn was 0.6–1.0 V lower than those of Co, Cr, Fe, and Ni in chloride media which could lead to galvanic coupling effects [ 33 ]. What is more, the difference of corrosion properties between the XOY plane and XOZ plane would be on account of the anisotropic microstructure of the cellular-dendritic sub-structures.…”

Section: Resultsmentioning

confidence: 99%

Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting

Wang

Sun

et al. 2020

Materials

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This study investigated the anisotropic characteristics of the microstructural, mechanical and corrosion properties of CoCrFeMnNi high-entropy alloy produced by selective laser melting (SLM) additive manufacturing (AM). Under the extremely high thermal gradient during the SLM process, a columnar solidification structure with a single face-centered cubic (FCC) phase structure was formed. The crystal structure exhibited a regular checkerboard structure in the XOY plane (perpendicular to the building direction), which was composed of {110} direction and a small amount of {100} fiber texture. The cellular-dendritic sub-structures formed in the columnar crystal structure with sizes of about 500 nm in diameter. As for the mechanical properties, the XOY plane exhibited higher ultimate tensile strength and yield strength (σ0.2) but lower elongation to failure compared to the XOZ plane (parallel to building direction), which reflected the anisotropy of the microstructure. The electrochemical test results of the different planes showed that the XOZ plane exhibited better corrosion resistance in comparison with the XOY plane in the 3.5 wt % NaCl solution, which was on account of the selective attack at the Mn-rich inter-cellular regions and the different structures of the cellular-dendritic sub-structures on different planes.

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Section: Resultsmentioning

confidence: 99%

Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting

Wang

Sun

et al. 2020

Materials

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“…In some cases [28][29][30][31][32], the authors only report a columnar microstructure with grains growing along the built direction. Other authors refer to the presence of a cellular structure (far from the equiaxed structure) that can be transformed into an equiaxed structure through an annealing process [33,34]. In most cases, the columnar structure coexists with equiaxed grains [35][36][37][38][39], especially in the final step of the solidification pool or near the walls of the solidification area, where columnar and equiaxial grains can progress together.…”

Section: Microstructural Analysis Of the Additive Manufactured Alloysmentioning

confidence: 99%

“…If we modify the selected processing conditions, this situation can change slightly. Heat treatments or cooling rates [33,40] can promote a greater amount of equiaxed grains, and higher beam energy promotes higher equiaxed grains [41]. More than 1/3 of considered papers, focus on modified CA by the replacement of Mn by Al to a certain extent.…”

Section: Microstructural Analysis Of the Additive Manufactured Alloysmentioning

confidence: 99%

High Entropy Alloys Manufactured by Additive Manufacturing

Torralba

Campos

2020

Metals

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High entropy alloys have attracted much interest over the last 16 years due to their promising an unusual properties in different fields that offer many new possible application. Additionally, additive manufacturing has drawn attention due to its versatility and flexibility ahead of a new material challenge, being a suitable technology for the development of metallic materials. Moreover, high entropy alloys have demonstrated that many gaps exist in the literature on its physical metallurgy, and in this sense, additive manufacturing could be a feasible technology for solving many of these challenges. In this review paper the newest literature on this topic is condensed into three different aspects: the different additive manufacturing technologies employed to process high entropy alloys, the influence of the processing conditions and composition on the expected structure and microstructure and information about the mechanical and corrosion behavior of these alloys.

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“…Some notable techniques in additively manufactured (AMed) processes include the laminated objective manufacturing (LOM), 3D printing, fused deposition modeling (FDM), stereolithography (SLA), laser metal deposition (LMD), and selective laser sintering (SLS) [4][5][6][7][8][9][10][11][12]. With AM, an enhanced range of surface finish and characteristics can be obtained on material surfaces that are not possible with conventional manufacturing processes [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…Defects arise during the manufacturing process or during the post-processing of alloys which make the materials vulnerable to corrosion. Recent research revealed insights from the corrosion behaviors in stainless steel, titanium alloys, aluminum alloys, and other alloys [11][12][13][14][15]. Galvanic corrosion can be used beneficially for energy harvesting [16].…”

Section: Introductionmentioning

confidence: 99%

A Review on Corrosion and Wear of Additively Manufactured Alloys

Renner

Jha

Chen

et al. 2021

Journal of Tribology

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Products made from additive manufacturing processes have attracted great attention in engineering, health care, and society at large. However, there is little knowledge about the failure of additively manufactured alloys, in particular, corrosion and wear seen in most engineering applications. The haphazard and inefficient usage of such alloys raised concerns about safety, compatibility, reliability, cost, and consumer satisfaction. To address those concerns, we studied the mechanisms of the most common failure modes, corrosion and wear, of alloys fabricated through additive manufacturing based on published literature. It was found that the processing conditions have profound influence on microstructure and thus corrosion and wear resistance of alloys. Because of the layered structure, the initiation and growth of both corrosion and wear exhibited anisotropic behavior. The insights from this review could be used as a reference of the state-of-the art and to help in the development of future additively manufactured alloys with improved corrosion and wear properties.

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Mechanical and Corrosion Properties of Additively Manufactured CoCrFeMnNi High Entropy Alloy

Cited by 49 publications

References 96 publications

Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting

Anisotropic Response of CoCrFeMnNi High-Entropy Alloy Fabricated by Selective Laser Melting

High Entropy Alloys Manufactured by Additive Manufacturing

A Review on Corrosion and Wear of Additively Manufactured Alloys

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