Microstructural and mechanical properties of dissimilar friction stir welded CoCrFeMnNi high entropy alloy to STS304 stainless steel

Asadi, Saeed; Park, Nokeun

doi:10.1016/j.msea.2022.142979

Cited by 27 publications

(5 citation statements)

References 13 publications

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“… Statistics of mechanical properties of similar or dissimilar welded MCAs [ 12 , 13 , 14 , 15 , 17 , 24 , 26 , 36 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 ]. …”

Section: Figurementioning

confidence: 99%

“…However, the dissimilar welding between multiple-component alloy and traditional alloy (such as austenitic stainless steel) is very complicated due to the existence of a nonequilibrium solidification environment in the fusion zone (FZ) and the associated formation of harmful phases [ 13 ] to increase the brittleness of the welded joint. Up to now, only a few articles were reported about the dissimilar welding of multiple-component alloy with austenitic stainless steel [ 13 , 14 , 15 , 16 , 17 ] Oliveira et al [ 17 ] investigated the dissimilar laser welding of a CoCrFeMnNi high entropy alloy to 316 stainless steel and found that a new solid solution formed in the welded joint area. Concurrently, the C element in 316 stainless steel can effectively enhance the hardness of welded joints.…”

Section: Introductionmentioning

confidence: 99%

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High-Strength Ductility Joining of Multicomponent Alloy to 304 Stainless Steel Using Laser Welding Technique

et al. 2023

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In this work, a series of multicomponent alloys (CoCrFeNi, CoCrNi, and CoNiV) were laser welded with 304 stainless steel (304ss), and detailed comparisons on microstructural characteristics and mechanical properties were conducted for dissimilar laser welded joints. It is revealed that all of the dissimilar laser welded samples possessed defect-free joints and the corresponding fusion zone consisting of fcc single-phase showed homogeneous element distribution accompanied by a narrow element gradient in the vicinity of the fusion zone boundary. After laser welding with identical welding parameters, equiaxed grain was observed on the side of multicomponent alloy, while coarse columnar grain was obtained on the side of 304ss. Especially, the columnar grains of the fusion zone on the side of 304ss disclosed preferential <001> growth direction in the CoCrFeNi/304ss and CoCrNi/304ss welded joints. Furthermore, all of the dissimilar laser welded joints were fractured in the fusion zone, attributing to the drastic loss of strength in the fusion zone with coarsened grain. It is worth noting that a special lamellar structure that merged by dimples was found in the fracture surface of the CoNiV/304ss joint, closely related to the existence of the V-enriched region. Finally, a high strength–ductile synergy can be achieved by laser welding CoNiV alloy to 304ss, which showed a yield strength of 338 MPa, ultimate tensile strength of 686 MPa, and total elongation of 28.9%. These excellent mechanical properties prevailed in the potential of a CoNiV/304ss laser welded joint to be applied as a structural material.

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“… Statistics of mechanical properties of similar or dissimilar welded MCAs [ 12 , 13 , 14 , 15 , 17 , 24 , 26 , 36 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 ]. …”

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-Strength Ductility Joining of Multicomponent Alloy to 304 Stainless Steel Using Laser Welding Technique

et al. 2023

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“…The cobalt (Co) and nickel (Ni) contents were reduced compared to the Cantor HEA (CoCrFeMnNi), resulting in improved tensile properties attributed to its metastable FCC phase. However, the presence of a small amount of body-centred cubic (BCC) in its microstructure could potentially lead to poor mechanical properties in the weld joints [ 19 , 20 , 21 ]. To address this issue, the utilisation of a HEA filler metal (Cantor alloy) was considered for stabilising austenite and suppressing the formation of BCC in the WZ [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Microstructural and Mechanical Properties of Ferrous Medium-Entropy Alloy through Cu Addition and Post-Weld Heat Treatment in Gas Tungsten Arc Welding

Yoo,

Lee,

Choi

et al. 2023

Materials

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This study investigates the impact of a high-entropy alloy filler metal coated with copper (Cu) and post-weld heat treatment (PWHT) on the weldability of a ferrous medium-entropy alloy (MEA) in gas tungsten arc welding. The addition of 1-at% Cu had an insignificant effect on the microstructural behaviour, despite a positive mixing enthalpy with other elements. It was observed that a small amount of Cu was insufficient to induce phase separation into the Cu-rich phase and refine the microstructure of the as-welded specimen. However, with an increase in the PWHT temperature, the tensile strength remained mostly consistent, while the elongation significantly increased (elongation of as welded, PWHT700, PWHT800, and PWHT 900 were 19, 43, 55 and 68%, respectively). Notably, the PWHT temperature of 900 °C yielded the most desirable results by shifting the fracture location from the coarse-grained heat-affected zone (CGHAZ) to base metal (BM). This was due to significant recrystallisation and homogenised hardness of the cold-rolled BM during PWHT. However, the CGHAZ with coarse grains induced by the welding heat input remained invariant during the PWHT. This study proposes a viable PHWT temperature (900 °C) for enhancing the weldability of cold-rolled ferrous MEA without additional process.

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“…Successful joints were made of polymers such as Polyethylene (PE) [ 53 , 54 ], Polycarbonate (PC) [ 55 , 56 ], and Polymethyl Methacrylate (PMMA) [ 57 , 58 ]. Furthermore, the FSW process was utilized to join dissimilar metals [ 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 ], dissimilar polymers [ 69 , 70 , 71 ], and hybrid metal–polymer joints [ 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 ]. Therefore, the FSW process gained global recognition due to its potential in various applications in the automotive, aerospace, shipbuilding, and railway industries [ 89 ].…”

Section: Introductionmentioning

confidence: 99%

“…Researchers have studied several properties of the weld joint. Microstructural investigations revealed that the stir zone consists of fine-grain structures that were created due to dynamic recrystallization [ 61 , 64 ]. Several studies reported a high joint strength for dissimilar materials using the FSW technique.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Technical Review of the Friction Stir Welding of Metal-to-Polymer Hybrid Structures

et al. 2022

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Metal–polymer hybrid structures are becoming desirable due to their wide range of applications in the automotive, aerospace, biomedical and construction industries. Properties such as a light weight, high specific strength, and design flexibility along with the low manufacturing costs of metal–polymer hybrid structures make them widely attractive in several applications. One of the main challenges that hinders the widespread utilization of metal–polymer hybrid structures is the challenging dissimilar joining of metals to polymers. Friction stir welding (FSW) shows a promising potential in overcoming most of the issues and limitations faced in the conventional joining methods of such structures. Several works in the literature have explored the FSW of different metal-to-polymer combinations. In some of the works, the joints are examined based on processing parameter optimization, microstructural characteristics, and mechanical performances. It is, therefore, important to summarize the findings of these works as a means of providing a reference to researchers to facilitate further research on the utilization of FSW in joining metals to polymers. Thus, this work aims to present a comprehensive technical review on the FSW technique for joining metals to polymers by reviewing the reported literature findings on the impact of materials, tools, process parameters, and defects on the strength and microstructure of the produced joints. In addition, this work reviews and presents the latest practices aiming to enhance the metal–polymer joint quality that have been reported in the literature.

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Microstructural and mechanical properties of dissimilar friction stir welded CoCrFeMnNi high entropy alloy to STS304 stainless steel

Cited by 27 publications

References 13 publications

High-Strength Ductility Joining of Multicomponent Alloy to 304 Stainless Steel Using Laser Welding Technique

High-Strength Ductility Joining of Multicomponent Alloy to 304 Stainless Steel Using Laser Welding Technique

Enhancing Microstructural and Mechanical Properties of Ferrous Medium-Entropy Alloy through Cu Addition and Post-Weld Heat Treatment in Gas Tungsten Arc Welding

A Comprehensive Technical Review of the Friction Stir Welding of Metal-to-Polymer Hybrid Structures

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