Microstructure and texture of heavily cold-rolled and annealed extremely low stacking fault energy Cr26Mn20Fe20Co20Ni14 high entropy alloy: Comparative insights

Paul, Shiladitya; Tripathy, B.; Saha, Rajib; Bhattacharjee, P.P.

doi:10.1016/j.jallcom.2022.167418

Cited by 15 publications

(4 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the process of cold rolling deformation, the degree of grain deformation increases with the increase of deformation [ 11 ]. From the overall deformation trend of the grains, as the deformation increases step by step, most of the grains have undergone severe plastic deformation, and the grains have been divided into many fine grains.…”

Section: Analysis Of Rolling Test Resultsmentioning

confidence: 99%

Research on the Cold Rolling Process, Microstructure and Properties of 305 Austenitic Stainless Steel Thin Strips

Wang,

Pan,

Chen

et al. 2024

Materials

View full text Add to dashboard Cite

Austenitic stainless steel has high toughness and plasticity; however, it tends to exhibit low yield strength, which severely limits the widespread application of this steel. It can be strengthened by cold working; however, this will cause many defects in the structure. Therefore, annealing treatment must be carried out before use. In this paper, the effects of annealing treatment at different temperatures and times on the microstructure and mechanical properties of cold-rolled 305 stainless steel sheet were studied and the theoretical mechanism was further analyzed to provide better theoretical guidance for production and application. It was found that the microstructure grains obtained by annealing at 850 °C for 30 s were finer and more uniform, and the mechanical properties were also the best, which met the requirements of strong plasticity. Therefore, the rolling and annealing experiments could be carried out again under this annealing condition, and the requirements of the finished product could be finally obtained. At this time, the thickness of the plate was about 0.15 mm, the yield strength was 1238 MPa, and the permeability was below 1.02, which met the production requirements of the metal mask plate.

show abstract

Section: Analysis Of Rolling Test Resultsmentioning

confidence: 99%

Research on the Cold Rolling Process, Microstructure and Properties of 305 Austenitic Stainless Steel Thin Strips

Wang,

Pan,

Chen

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…[50] Thus, the annealed treatment improved the strength and fracture elongation of the sample due to the reduction of grain size and formation of the precipitated phase. According to the analysis in Figure 8c,d, the current CRA Co 34 Cr 32 Ni 27 Al 3.5 Ti 3.5 MEA demonstrates an exceptional balance of strength and ductility superior to most reported similar H/MEAs, [16,[51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68] suggesting that the strengthening-toughening strategy adopted in this work is effective.…”

Section: Tensile Properties and Strengthening Mechanisms With Differe...mentioning

confidence: 90%

“…The ultimate tensile stress (UTS) of the CR sample increased from 820.5 to 1687.3 MPa, while the fracture elongation decreased to 1.9%. Compared with CRA-1173 K and [16,[51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68] CRA-1373 K samples, the CRA-1273 K sample had a UTS of 1109.3 MPa, which was 35.2% higher than the as-cast sample in Figure 8a. The CRA-1273 K sample maintains superior properties (YS = ≈678.4 MPa and uniform elongation [UE] = ≈44.…”

Section: Tensile Properties and Strengthening Mechanisms With Differe...mentioning

confidence: 99%

“…Figure 8. Mechanical properties of Co 34 Cr 32 Ni 27 Al 3.5 Ti 3.5 MEA under different processing conditions: a) representative tensile engineering stress-strain curves, b) true stress-strain curves, and corresponding strain-hardening ones, c) variations of YS, UTS, and UE, d) UTS versus UE of current Co 34 Cr 32 Ni 27 Al 3.5 Ti 3.5 MEA, compared to various M/HEAs [16,[51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68]. …”

mentioning

confidence: 99%

See 1 more Smart Citation

Strengthening and Toughening of the Co₃₄Cr₃₂Ni₂₇Al_3.5Ti_3.5 Alloy Through Coherent L1₂ Nanoprecipitates

Li,

Song,

Gao

et al. 2024

Adv Eng Mater

View full text Add to dashboard Cite

In this work, the L12‐strengthened Co34Cr32Ni27Al3.5Ti3.5 medium‐entropy alloy (MEA) with outstanding strength and ductility was developed through cold rolling and annealing (CRA). The CRA promotes the formation of coherent L12 nanoprecipitates in the matrix and precipitates inside the grains (Ti‐rich phases), resulting in dislocation sliding and multiplication during deformation. The as‐cast sample exhibits low yield strength (YS) of ∽498.5 MPa, ultimate tensile strength (UTS) of ∽820.5 MPa, and uniform elongation (UE) of ∽29.8%. After cold rolling and annealing, the YS, UTS, and UE are significantly increased to ∽678.4 MPa, ∽1109.3 MPa, and ∽44.5%, respectively. The excellent mechanical performance results from dislocation strengthening and precipitation strengthening of the L12 phase. The trade‐off of strength‐ductility is resolved by achieving an appropriate balance between the hard phase rich in L12/Ti and the soft FCC phase. Our finding demonstrates that the CRA method can be used to create coherent L12 nanoprecipitates that are beneficial for strong and ductile MEA. This work provides a broader perspective for CoCrNi‐based MEAs with high performance in the future.This article is protected by copyright. All rights reserved.

show abstract

Enhancing Strength-Ductility Synergy of CoCrNi-Based Medium-Entropy Alloy Through Coherent L12 Nanoprecipitates and Grain Boundary Precipitates

Li,

Song,

Gao

et al. 2023

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

The L12-strengthened Co34Cr32Ni27Al4Ti3 medium-entropy alloy (MEA) with precipitations of grain boundaries has been developed through selective laser melting (SLM) followed by cold rolling and annealing, exhibiting excellent strength-ductility synergy. The as-printed alloy exhibits low yield strength (YS) of ~ 384 MPa, ultimate tensile strength (UTS) of ~ 453 MPa, and uniform elongation (UE) of 1.5% due to the existence of the SLM-induced defects. After cold rolling and annealing, the YS, UTS, and UE are significantly increased to ~ 739 MPa, ~ 1230 MPa, and ~ 47%, respectively. This enhancement primarily originates from the refined grain structure induced by cold rolling and annealing. The presence of coherent spherical γ' precipitates (L12 phases) and Al/Ti-rich precipitates at the grain boundaries, coupled with increased lattice defects such as dislocations, stacking faults, and ultrafine deformation twins, further contribute to the property’s improvement. Our study highlights the potential of SLM in producing high-strength and ductile MEA with coherent L12 nanoprecipitates, which can be further optimized through subsequent rolling and annealing processes. These findings offer valuable insights for the development of high-performance alloys for future engineering applications.

show abstract

Microstructure and texture of heavily cold-rolled and annealed extremely low stacking fault energy Cr26Mn20Fe20Co20Ni14 high entropy alloy: Comparative insights

Cited by 15 publications

References 50 publications

Research on the Cold Rolling Process, Microstructure and Properties of 305 Austenitic Stainless Steel Thin Strips

Research on the Cold Rolling Process, Microstructure and Properties of 305 Austenitic Stainless Steel Thin Strips

Strengthening and Toughening of the Co₃₄Cr₃₂Ni₂₇Al_3.5Ti_3.5 Alloy Through Coherent L1₂ Nanoprecipitates

Enhancing Strength-Ductility Synergy of CoCrNi-Based Medium-Entropy Alloy Through Coherent L12 Nanoprecipitates and Grain Boundary Precipitates

Contact Info

Product

Resources

About

Microstructure and texture of heavily cold-rolled and annealed extremely low stacking fault energy Cr26Mn20Fe20Co20Ni14 high entropy alloy: Comparative insights

Cited by 15 publications

References 50 publications

Research on the Cold Rolling Process, Microstructure and Properties of 305 Austenitic Stainless Steel Thin Strips

Research on the Cold Rolling Process, Microstructure and Properties of 305 Austenitic Stainless Steel Thin Strips

Strengthening and Toughening of the Co34Cr32Ni27Al3.5Ti3.5 Alloy Through Coherent L12 Nanoprecipitates

Enhancing Strength-Ductility Synergy of CoCrNi-Based Medium-Entropy Alloy Through Coherent L12 Nanoprecipitates and Grain Boundary Precipitates

Contact Info

Product

Resources

About

Strengthening and Toughening of the Co₃₄Cr₃₂Ni₂₇Al_3.5Ti_3.5 Alloy Through Coherent L1₂ Nanoprecipitates