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

Lin, Chao-Sung; Shiue, Ren-Kae; Wu, Shyi‐Kaan; Lin, Yu-Cheng

doi:10.3390/cryst9100518

Cited by 15 publications

(9 citation statements)

References 48 publications

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“…Considering this, the next topics that are presented in this paper mainly concern the overall progress on fusion-based and solid-state welding processes on HEAs. Nevertheless, information about welding HEAs through brazing is also available, as presented by Lin et al [52], where dissimilar joints between CoCrFeMnNi/CoCrFeNi alloy and CoCrFeMnNi/316 stainless steel were investigated.…”

Section: Current Progress On Welding Heasmentioning

confidence: 99%

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: Current Progress On Welding Heasmentioning

confidence: 99%

A Short Review on Welding and Joining of High Entropy Alloys

Lopes

Oliveira

2020

Metals

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“…In spite of the unsuccessful attempt of joint this hybrid structure, such an approach with careful evaluation of the microstructural evolution of the BM/WZ interface as well as compositional matching between the materials to be welded and the filler metal could represent an important strategy for hybrid structure welding. The use of brazing welding has also been reported along with HEAs [40,41]. Lin et al [40] investigated the dissimilar infrared brazing of CoCrFeMnNi equiatomic high entropy alloy and 316 stainless steel.…”

Section: Challenges and Future Perspectivementioning

confidence: 99%

“…The use of brazing welding has also been reported along with HEAs [40,41]. Lin et al [40] investigated the dissimilar infrared brazing of CoCrFeMnNi equiatomic high entropy alloy and 316 stainless steel. In that study, two nickel-based fillers (BNi-2 and MBF601) were investigated as candidates for producing the CoCrFeMnNi / 316 SS joint.…”

Section: Challenges and Future Perspectivementioning

confidence: 99%

“…Moreover, it was observed that, if the brazing temperature is way above the Liquidus temperature, the shear strength of the brazing decreased, as shown in Figure 11b. The use of brazing welding has also been reported along with HEAs [40,41]. Lin et al [40] investigated the dissimilar infrared brazing of CoCrFeMnNi equiatomic high entropy alloy and 316 stainless steel.…”

Section: Challenges and Future Perspectivementioning

confidence: 99%

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Welding Joints in High Entropy Alloys: A Short-Review on Recent Trends

Filho

Monteiro

2020

Materials

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High entropy alloys (HEAs) emerged in the beginning of XXI century as novel materials to “keep-an-eye-on”. In fact, nowadays, 16 years after they were first mentioned, a lot of research has been done regarding the properties, microstructure, and production techniques for the HEAs. Moreover, outstanding properties and possibilities have been reported for such alloys. However, a way of jointing these materials should be considered in order to make such materials suitable for engineering applications. Welding is one of the most common ways of jointing materials for engineering applications. Nevertheless, few studies concerns on efforts of welding HEAs. Therefore, it is mandatory to increase the investigation regarding the weldability of HEAs. This work aims to present a short review about what have been done in recent years, and what are the most common welding techniques that are used for HEAs. It also explores what are the measured properties of welded HEAs as well as what are the main challenges that researchers have been facing. Finally, it gives a future perspective for this research field.

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“…Welding, an irreplaceable metal forming method, plays a pivotal role in the practical applications of emerging HEAs and MEAs. Recently reported welding methods include fusion welding [16], friction welding [17,18], brazing [19,20], transient liquid phase bonding [15], and diffusion bonding [21][22][23]. Diffusion bonding, a solid-state welding technology, exhibits exceedingly good adaptability to advanced structural materials and hardly damages the performance of base metal.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Diffusion-Bonded CoCrNi-Based Medium-Entropy Alloy to DD5 Single-Crystal Superalloy Joint

Sun

et al. 2021

Crystals

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This study focuses on the diffusion bonding of a CoCrNi-based medium-entropy alloy (MEA) to a DD5 single-crystal superalloy. The microstructure and mechanical properties of the joint diffusion-bonded at variable bonding temperatures were investigated. The formation of diffusion zone, mainly composed of the Ni3(Al, Ti)-type γ′ precipitates and Ni-rich MEA matrix, effectively guaranteed the reliable joining of MEA and DD5 substrates. As the bonding temperature increased, so did the width of the diffusion zone, and the interfacial microvoids significantly closed, representing the enhancement of interface bonding. Both tensile strength and elongation of the joint diffusion-bonded at 1110 °C were superior to those of the joints diffusion-bonded at low temperatures (1020, 1050, and 1080 °C), and the maximum tensile strength and elongation of 1045 MPa and 22.7% were obtained. However, elevated temperature produced an adverse effect that appeared as grain coarsening of the MEA substrate. The ductile fracture of the joint occurred in the MEA substrate (1110 °C), whereas the tensile strength was lower than that of the MEA before diffusion bonding (approximately 1.3 GPa).

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

Cited by 15 publications

References 48 publications

A Short Review on Welding and Joining of High Entropy Alloys

A Short Review on Welding and Joining of High Entropy Alloys

Welding Joints in High Entropy Alloys: A Short-Review on Recent Trends

Microstructure and Mechanical Properties of Diffusion-Bonded CoCrNi-Based Medium-Entropy Alloy to DD5 Single-Crystal Superalloy Joint

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