On the Cr-rich continuous and discontinuous precipitation kinetics in Ni-Cr alloys by microstructural characterization and differential scanning calorimetry analysis

Yan, Dongchao; Qiu, Nianshuang; Zuo, Xiaowei

doi:10.1016/j.matlet.2021.129887

Cited by 8 publications

(3 citation statements)

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“…GB wetting by the second solid phase can have a strong influence on the properties of materials, including Al alloys [18,20,22,23,[25][26][27][28][29][30][31][32][33][34][35], Fe-based alloys and steels [36,, Co-and Ni-based alloys [78][79][80][81][82][83][84][85], Cu alloys [86,88,90], Ti-and Zr-based alloys [91,93,95,97,, Mg alloys [124,126,[128][129][130][131], as well multicomponent and high-entropy alloys [132,134,[136][137][138][139][140][141][142][143][144].…”

Section: Influence Of Gb Wetting By the Second Solid Phase On The Pro...mentioning

confidence: 99%

“…The high-temperature oxidation behavior induced by precipitation in a Ni-Y-Al alloy is also controlled by the wetting of interfaces [82] [79], in a Ni-Y-Al alloy after high-temperature oxidation [82], in the (Ti 45 Ni 55 ) 100−x Fe x (x = 0.5, 1, 3, 5 at%) alloy containing X-phase precipitates and having high hardness and high compressive strength [85], the Invar/Cu bimetal composites [88], NiTi superelastic alloy manufactured by selective laser melting [115], Cu based Ti 2 AlC composite [91] as well as in Bi-containing brass (Cu-3wt%Bi-30wt%Zn) [90]. The transition between discontinuous and continuous precipitation of the Cr-rich phase was observed by the annealing of solution-treated binary Ni-Cr alloys with 30%, 35%, 40%, 45%, and 50% Cr, and ternary ones doped by 0.5% third elements (Cu, Zr, Nb, Fe, and B) [81]. In some samples, this Cr-rich phase formed continuous wetting layers along matrix GBs (Figure 18).…”

Section: Influence Of Gb Wetting By the Second Solid Phase On The Pro...mentioning

confidence: 99%

“…Almost 20 years have passed since the discovery of the phenomenon of GB wetting by other solid phases in 2004 [17]. The indications of GB wetting by other solid phases were found and studied in a large circle of systems such as Al alloys [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35], Fe-based alloys and steels , Co-and Ni-based alloys [77][78][79][80][81][82][83][84][85], Cu alloys [86][87][88][89][90], Ti-and Zr-based alloys , Mg alloys [124][125][126][127][128][129][130][131], as well multicomponent and high-entropy alloys [132][133][134][135][136]…”

Section: Introductionmentioning

confidence: 99%

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Grain Boundary Wetting by the Second Solid Phase: 20 Years of History

Straumal

Lepkova

Korneva

et al. 2023

Metals

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Grain boundaries (GBs) can be wetted by a second phase. This phase can be not only liquid (or melted), but it can also be solid. GB wetting can be incomplete (partial) or complete. In the case of incomplete (partial) wetting, the liquid forms in the GB droplets, and the second solid phase forms a chain of (usually lenticular) precipitates. Droplets or precipitates have a non-zero contact angle with the GB. In the case of complete GB wetting, the second phase (liquid or solid) forms in the GB continuous layers between matrix grains. These GB layers completely separate the matrix crystallites from each other. GB wetting by a second solid phase has some important differences from GB wetting by the melt phase. In the latter case, the contact angle always decreases with increasing temperature. If the wetting phase is solid, the contact angle can also increase with increasing temperature. Moreover, the transition from partial to complete wetting can be followed by the opposite transition from complete to partial GB wetting. The GB triple junctions are completely wetted in the broader temperature interval than GBs. Since Phase 2 is also solid, it contains GBs as well. This means that not only can Phase 2 wet the GBs in Phase 1, but the opposite can also occur when Phase 1 can wet the GBs in Phase 2. GB wetting by the second solid phase was observed in the Al-, Mg-, Co-, Ni-, Fe-, Cu-, Zr-, and Ti-based alloys as well as in multicomponent alloys, including high-entropy ones. It can seriously influence various properties of materials.

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