Role of copper on L12 precipitation strengthened fcc based high entropy alloy

Gwalani, Bharat; Gorsse, Stéphane; Soni, Vishal; Carl, Matthew; Ley, Nathen; Smith, Jesse; Ayyagari, Aditya; Zheng, Yufeng; Young, Marcus L.; Mishra, Rajiv S.

doi:10.1016/j.mtla.2019.100282

Cited by 43 publications

(12 citation statements)

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“…[ 129 ] Thus, the influences of the addition of Ti along with Al on the precipitation of the γ ′ phase have been investigated extensively. [ 38 , 46 , 70 , 130 , 148 , 149 ] On the other hand, Ti can act as a forming agent for the L1 2 phase, contributing to the formation of the L1 2 structure of the Ni 3 (Al, Ti) γ ′ phase. [ 146 ] In addition, according to Yang et al., [ 87 ] the high content of Al in the alloy will cause the severe environmental embrittlement in air.…”

Section: Nanoprecipitatesmentioning

confidence: 99%

Nanoprecipitate‐Strengthened High‐Entropy Alloys

et al. 2021

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Multicomponent high-entropy alloys (HEAs) can be tuned to a simple phase with some unique alloy characteristics. HEAs with body-centered-cubic (BCC) or hexagonal-close-packed (HCP) structures are proven to possess high strength and hardness but low ductility. The faced-centered-cubic (FCC) HEAs present considerable ductility, excellent corrosion and radiation resistance. However, their strengths are relatively low. Therefore, the strategy of strengthening the ductile FCC matrix phase is usually adopted to design HEAs with excellent performance. Among various strengthening methods, precipitation strengthening plays a dazzling role since the characteristics of multiple principal elements and slow diffusion effect of elements in HEAs provide a chance to form fine and stable nanoscale precipitates, pushing the strengths of the alloys to new high levels. This paper summarizes and review the recent progress in nanoprecipitate-strengthened HEAs and their strengthening mechanisms. The alloy-design strategies and control of the nanoscale precipitates in HEAs are highlighted. The future works on the related aspects are outlined.

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Section: Nanoprecipitatesmentioning

confidence: 99%

Nanoprecipitate‐Strengthened High‐Entropy Alloys

et al. 2021

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“…The binary constituents in these HEAs encourage the formation of the FCC phase. In addition, the addition of elements such as Cu and Ti stabilizes the FCC phase [ 100 , 101 ]. In the Al x CoCrFeNi alloy system, the addition of Ti promotes phase evolution from the BCC to an FCC phase [ 81 ].…”

Section: Microstructural Evolution Of Heas Synthesized Through the Melting And Casting Routementioning

confidence: 99%

Synthesis Route, Microstructural Evolution, and Mechanical Property Relationship of High-Entropy Alloys (HEAs): A Review

et al. 2021

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Microstructural phase evolution during melting and casting depends on the rate of cooling, the collective mobility of constituent elements, and binary constituent pairs. Parameters used in mechanical alloying and spark plasma sintering, the initial structure of binary alloy pairs, are some of the factors that influence phase evolution in powder-metallurgy-produced HEAs. Factors such as powder flowability, laser power, powder thickness and shape, scan spacing, and volumetric energy density (VED) all play important roles in determining the resulting microstructure in additive manufacturing technology. Large lattice distortion could hinder dislocation motion in HEAs, and this could influence the microstructure, especially at high temperatures, leading to improved mechanical properties in some HEAs. Mechanical properties of some HEAs can be influenced through solid solution hardening, precipitation hardening, grain boundary strengthening, and dislocation hardening. Despite the HEA system showing reliable potential engineering properties if commercialized, there is a need to examine the effects that processing routes have on the microstructure in relation to mechanical properties. This review discusses these effects as well as other factors involved.

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“…Following this strategy, several studies report the effects of modifying the chemical composition of Cantor's alloy. The strategies implemented so far are numerous: nonequiatomic compositions [19][20][21][22]; small additions of interstitial elements like carbon or boron leading to solid solution strengthening and to the precipitation of inclusions [23][24][25][26][27]; or small additions of new elements in substitution like copper or titanium resulting in the stabilization of new phases [28][29][30][31]. Nevertheless, the strategy the most implemented is the addition of aluminium which leads to the stabilization of the ordered B2 phase [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60].…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

“…The presence of the B2 phase induces a strengthening of the material that can be at the expense of ductility when its formation is not well controlled. While many studies have focused on as-cast materials [1,23,25,28,30,32,43,46,[49][50][51]55,[61][62][63][64][65][66][67][68][69][70][70][71][72][73], several recent studies used thermomechanical treatments with the objective of better controlling their final microstructures [31,[74][75][76][77][78][79][80][81][82][83][84][85][86][87][88]. For example, the recent work of R. Banerjee et al [81][82][83][84][85][86]…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Microstructure study of cold rolled Al0.32CoCrFeMnNi high-entropy alloy: Interactions between recrystallization and precipitation

Hachet

Gorsse

Godet

2021

Materials Science and Engineering: A

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Role of copper on L12 precipitation strengthened fcc based high entropy alloy

Cited by 43 publications

References 50 publications

Nanoprecipitate‐Strengthened High‐Entropy Alloys

Nanoprecipitate‐Strengthened High‐Entropy Alloys

Synthesis Route, Microstructural Evolution, and Mechanical Property Relationship of High-Entropy Alloys (HEAs): A Review

Microstructure study of cold rolled Al0.32CoCrFeMnNi high-entropy alloy: Interactions between recrystallization and precipitation

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