Microstructure and mechanical properties of friction stir welded and laser welded high entropy alloy CrMnFeCoNi

Jo, Min-Gu; Kim, Han‐Jin; Kang, Minjung; Madakashira, Phaniraj; Park, Eun Soo; Suh, Jin‐Yoo; Kim, Dong Ik; Hong, Sung-Tae; Han, Heung Nam

doi:10.1007/s12540-017-7248-x

Cited by 95 publications

(60 citation statements)

References 27 publications

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“…On a similar laser welding case, increasing the welding speed, which varied between 6, 8, and 10 m/min, and corresponds to a Other researchers have also used laser welding for similar joining of CoCrFeNiMn HEAs. Jo et al [55] also found that the hardness of the fusion zone of the joint was higher than in the base materials and also that the FCC structure was preserved. These results show the good reproducibility in terms of mechanical properties in laser welded CoCrFeMnNi HEAs obtained by different research groups.…”

Section: Cocrfenimn Hea Systemmentioning

confidence: 93%

“…Several studies [53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69] have already been reported on fusion-based welding of HEAs. To date, these works focus mainly on laser-based techniques, although some information is also available on Electron Beam and Gas Tungsten Arc Welding (GTAW) techniques.…”

Section: Fusion-based Welding Of Heasmentioning

confidence: 99%

“…As previously mentioned, welding materials in the solid state can be a reliable and advantageous way to achieve sound joints. The current information regarding welding HEAs using solid-state techniques shows that most studies are focused on friction stir welding (FSW) [55,[86][87][88][89][90][91][92]. Nevertheless, other possibilities for joining these materials are rotary friction welding [91] and diffusion bonding [92].…”

Section: Solid-state Welding Of Heasmentioning

confidence: 99%

“…Concerning FSW, the literature shows that an effort for the development and comprehension of the microstructural evolution of FSWed HEAs joints is underway. For instance, FSW of a CoCrFeNiMn HEA manufactured by vacuum induction melting, followed by thermomechanical processing was conducted by Jo et al [55]. After the welding process, the tensile strength and the ductility of the samples exhibited a similar behavior to that of the BM.…”

Section: Solid-state Welding Of Heasmentioning

confidence: 99%

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A Short Review on Welding and Joining of High Entropy Alloys

Lopes

Oliveira

2020

Metals

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High entropy alloys are one of the most exciting developments conceived in the materials science field in the last years. These novel advanced engineering alloys exhibit a unique set of properties, which include, among others, good mechanical performance under severe conditions in a wide temperature range and high microstructural stability over long time periods. Owing to the remarkable properties of these alloys, they can become expedite solutions for multiple structural and functional applications. Nevertheless, like any other key engineering alloy, their capacity to be welded, and thus become a permanent feature of a component or structure, is a fundamental issue that needs to be addressed to further expand these alloys’ potential applications. In fact, welding of high entropy alloys has attracted some interest recently. Therefore, it is important to compile the available knowledge on the current state of the art on this topic in order to establish a starting point for the further development of these alloys. In this article, an effort is made to acquire a comprehensive knowledge on the overall progress on welding of different high entropy alloy systems through a systematic review of both fusion-based and solid-state welding techniques. From the current literature review, it can be perceived that welding of high entropy alloys is currently gaining more interest. Several high entropy alloy systems have already been successfully welded. However, most research works focus on the well-known CoCrFeMnNi. For this specific system, both fusion and solid-state welding have been used, with no significant degradation of the joints’ mechanical properties. Among the different welding techniques already employed, laser welding is predominant, potentially due to the small size of its heat source. Overall, welding of high entropy alloys is still in its infancy, though good perspectives are foreseen for the use of welded joints based on these materials in structural applications.

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Section: Cocrfenimn Hea Systemmentioning

confidence: 93%

Section: Fusion-based Welding Of Heasmentioning

confidence: 99%

Section: Solid-state Welding Of Heasmentioning

confidence: 99%

Section: Solid-state Welding Of Heasmentioning

confidence: 99%

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A Short Review on Welding and Joining of High Entropy Alloys

Lopes

Oliveira

2020

Metals

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“…There are many studies on welding HEAs [35][36][37]. Good mechanical properties have been achieved in previous studies [38][39][40]. However, very limited researches are focused on brazing HEAs [41].…”

Section: Introductionmentioning

confidence: 99%

Dissimilar Infrared Brazing of CoCrFe(Mn)Ni Equiatomic High Entropy Alloys and 316 Stainless Steel

Lin

Shiue

et al. 2019

Crystals

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Dissimilar infrared brazing of CoCrFeMnNi/CoCrFeNi equiatomic high entropy alloys and 316 stainless steel using MBF601 and BNi-2 foils was evaluated. The wetting angles of the two fillers at 50 °C above their liquidus temperatures on the three substrates were below 40 degrees. The CoCrFeMnNi/316 SS joint had the highest shear strength of 361 MPa with BNi-2 filler brazing at 1020 °C for 180 s, and fractured at the CrB compound in the joint. The CoCrFeMnNi/MBF601/316 SS joint contained a CoCrFeMnNi-based matrix, phosphides and B-containing compounds. The CoCrFeNi/316 SS joint had the highest shear strength of 374 MPa when brazed with BNi-2 filler at 1020 °C for 600 s, and fractured at the CrB in the joint. The CoCrFeNi/MBF601/316 SS joint consisted of a (Fe,Ni)-rich matrix, phosphides and B/Cr/Fe/P compounds, and the highest shear strength of 324 MPa was achieved when it was brazed at 1080 °C for 600 s.

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Additive Manufacturing of CoCrFeMnNi High‐Entropy Alloy/AISI 316L Stainless Steel Bimetallic Structures

et al. 2022

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The CoCrFeMnNi high-entropy alloy (HEA) is composed of five principal elements in an equal molar ratio. As the alloy was initially designed by Cantor and his group, this alloy is also named as Cantor alloy more often. [1] In contrast to the traditional alloying concept (i.e., the formation of the complex intermetallic phases and/or compounds during multi-elemental alloying), the CoCrFeMnNi-HEA exhibits a simple microstructure and crystal structure (single face-centered cubic--fcc) even with five equimolar alloying elements. Yeh et al. proposed that the simple phase stabilization in multicomponent alloys can be attributed to the higher configurational entropy in the multicomponent alloy system. [2] Further, heavy lattice distortion and sluggish diffusion effects render the multicomponent alloy superior under mechanical loading, and in corrosive and irradiated environments. [3][4][5][6] Research on the mechanical properties by Otto et al. [7] and Gludovatz et al. [8] has revealed an exceptional damage tolerance of the CoCrFeMnNi-HEA, especially at cryogenic conditions, due to continuous strain hardening by the evolution of nanotwins and nanoscale bridging during deformation. [7,9] The fatigue limit of the CoCrFeMnNi-HEA evaluated after pre-straining at room temperature (550 MPa) as well as at cryogenic temperature (470 MPa) demonstrates

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Microstructure and mechanical properties of friction stir welded and laser welded high entropy alloy CrMnFeCoNi

Cited by 95 publications

References 27 publications

A Short Review on Welding and Joining of High Entropy Alloys

A Short Review on Welding and Joining of High Entropy Alloys

Dissimilar Infrared Brazing of CoCrFe(Mn)Ni Equiatomic High Entropy Alloys and 316 Stainless Steel

Additive Manufacturing of CoCrFeMnNi High‐Entropy Alloy/AISI 316L Stainless Steel Bimetallic Structures

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