Effect of Annealing on Microstructure and Mechanical Properties of Al0.5CoCrFeMoxNi High-Entropy Alloys

Zhuang, Yanxin; Zhang, Xiulan; Gu, Xianyu

doi:10.3390/e20110812

Cited by 19 publications

(9 citation statements)

References 32 publications

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“…CoCrMo powder (60-65% of Co, 26-30% of Cr, 5-7% of Mo) was chosen due to its excellent melting properties, heat resistivity, neutral reaction to the protective environment, and wide range of possible industrial applications [52][53][54]. The granular and morphometric analyses showed that the granules have a mostly spherical shape, which is preferable for better energy absorption [55][56][57].…”

Section: Powder Materialsmentioning

confidence: 99%

Power Density Distribution for Laser Additive Manufacturing (SLM): Potential, Fundamentals and Advanced Applications

et al. 2018

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Problems with the laser additive manufacturing of metal parts related to its low efficiency are known to hamper its development and application. The method of selective laser melting of metallic powders can be improved by the installation of an additional laser beam modulator. This allows one to control the power density distribution optically in the laser beam, which can influence the character of heat and mass transfer in a molten pool during processing. The modulator contributes alternative modes of laser beam: Gaussian, flat top (top hat), and donut (bagel). The study of its influence includes a mathematical description and theoretical characterization of the modes, high-speed video monitoring and optical diagnostics, characterization of processing and the physical phenomena of selective laser melting, geometric characterization of single tracks, optical microscopy, and a discussion of the obtained dependences of the main selective laser melting (SLM) parameters and the field of its optimization. The single tracks were produced using the advanced technique of porosity lowering. The parameters of the obtained samples are presented in the form of 3D graphs. The further outlook and advanced applications are discussed.

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Section: Powder Materialsmentioning

confidence: 99%

Power Density Distribution for Laser Additive Manufacturing (SLM): Potential, Fundamentals and Advanced Applications

et al. 2018

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“…High entropy alloys (HEAs) have attracted extensive investigations due to their scientific significance and application prospects [1]. Recently, novel mechanismdriven HEAs have been designed by incorporating other strengthening and deformation mechanisms besides the inherent solid solution strengthening, such as precipitation strengthening [2,3], interstitial solid solution strengthening [4][5][6], twinning-or/and transformationinduced plasticity (TWIP and TRIP, respectively) [7][8][9][10][11], to push the property boundary of possibility.…”

Section: Introductionmentioning

confidence: 99%

Selective laser melting enabling the hierarchically heterogeneous microstructure and excellent mechanical properties in an interstitial solute strengthened high entropy alloy

Zhu

et al. 2019

Materials Research Letters

156

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An interstitial solute strengthened high entropy alloy (iHEA), Fe 49.5 Mn 30 Co 10 Cr 10 C 0.5 (at.%), was successfully additively manufactured via selective laser melting. The as-built iHEA exhibits a hierarchically heterogeneous microstructure with length scales across several orders of magnitude, which engenders an enhanced strength-ductility combination relative to those fabricated by conventional processing routes. The high yield strength mainly stemmed from the dislocation strengthening besides the friction stress and grain boundary strengthening. The joint activation of multiple deformation mechanisms involving dislocation slip, deformation twinning and phase transformation can maintain the steady work-hardening behavior at high stress levels, leading to a high ductility. IMPACT STATEMENT A hierarchical interstitial high entropy alloy, Fe 49.5 Mn 30 Co 10 Cr 10 C 0.5 (at.%), was successfully additively manufactured via selective laser melting. Its exceptional strength-ductility synergy surpasses that of the most SLM processed conventional alloys.

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“…When the alloy satisfies both B/G > 1.75 and v > 0.26, the alloy exhibits ductile characteristics. Otherwise, it is brittle [38]. In addition, the larger the value, the better the ductility.…”

Section: Resultsmentioning

confidence: 99%

First‐Principles Calculations for the Enhancement of Mechanical Properties of High‐Entropy Alloys by Carbon Elements

Ding

Feng

Yuan

2023

IEEJ Transactions Elec Engng

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A series of alloy solid solution models were developed using the SQS modeling method, and the effect of C doping on the phase structure, elastic properties, and electronic structure of the alloys was investigated using a first‐principles approach. The results showed that the CuCrWNi (C), CuCrWMo (C), and CuCrWAl (C) alloys all have a single body‐centered cubic (BCC) structure. The alloys conformed to the mechanical stability criterion before and after incorporating C. The incorporation of C leads to an increase in the bulk modulus B of the CuCrWNi, CuCrWAl alloy, and the Young's modulus E and shear modulus G of the CuCrWMo, CuCrWAl alloy. In comparison, the shear modulus G and Young's modulus E of CuCrWNi alloy and the bulk modulus B of CuCrWMo alloy show a decreasing tendency. The alloy is ductile before and after the addition of C. The addition of C increased the Poisson's ratio, Pugh ratio, and Cauchy pressure of CuCrWNi alloy and decreased the Poisson's ratio, Pugh ratio, and Cauchy pressure of CuCrWMo and CuCrWAl. This shows that adding C improves the ductility of CuCrWNi and the strength of CuCrWMo and CuCrWAl alloys. By analyzing the electronic structure of the alloys, it was found that the doping of C made the alloy less stable. Adding C makes the high‐entropy alloys more conducive and the metallic properties more noticeable. Moreover, the incorporation of C makes the CuCrWNi pseudo‐energy gap decrease and the CuCrWMo, and CuCrWAl pseudo‐energy gap increase, which may be related to the change in the mechanical properties of the alloy. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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Effect of Annealing on Microstructure and Mechanical Properties of Al0.5CoCrFeMoxNi High-Entropy Alloys

Cited by 19 publications

References 32 publications

Power Density Distribution for Laser Additive Manufacturing (SLM): Potential, Fundamentals and Advanced Applications

Power Density Distribution for Laser Additive Manufacturing (SLM): Potential, Fundamentals and Advanced Applications

Selective laser melting enabling the hierarchically heterogeneous microstructure and excellent mechanical properties in an interstitial solute strengthened high entropy alloy

First‐Principles Calculations for the Enhancement of Mechanical Properties of High‐Entropy Alloys by Carbon Elements

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