Excellent combination of strength and ductility of CoCrNi medium entropy alloy fabricated by laser aided additive manufacturing

Weng, Fei; Chew, Youxiang; Zhu, Ze‐Lin; Yao, Xiling; Wang, Leilei; Ng, Fern Lan; Liu, Shibo; Bi, Guijun

doi:10.1016/j.addma.2020.101202

Cited by 22 publications

(12 citation statements)

References 51 publications

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“…Among various FCC HEAs systems, several HEAs have been frequently selected as model materials to study the fundamental deformation mechanisms and related mechanical properties. Figure shows plots of HV against

σ_{YS}

σ_{UTS}

for four representative FCC HEAs and stainless steels, i.e., CoCrFeMnNi, [ 35–48 ] CoCrNi, [ 49–52 ] CoCrFeNi, [ 45,48,53–58 ] and 316 stainless steels. [ 59–66 ] Herein, we selected 316 stainless steel as a model material to verify the difference between HEAs and traditional alloys with one principal element.…”

Section: Resultsmentioning

confidence: 99%

“…Plots of HV against a–d) tensile yield strength and ultimate tensile strength for a,e) CoCrFeMnNi, [ 35–48 ] b,f) CoCrNi, [ 49–52 ] c,g) CoCrFeNi, [ 45,48,53–58 ] and d,h) 316 stainless steels [ 59–66 ] with single‐phase FCC structures. The referenced three‐time line is included in each image.…”

Section: Resultsmentioning

confidence: 99%

“… General plots of HV against a,c) tensile yield strength and b,d) ultimate tensile strength of single‐phase FCC HEAs including Al 0.1 CoCrFeNi, [ 74–79 ] Al 0.25 CoCrFeNi, [ 28 ] Al 0.3 CoCrFeMnNi, [ 80 ] Al 0.3 CoCrFeNi, [ 81–84 ] CoCrFeMnNi, [ 35–48 ] (CoCrFeMnNi) x Al 100– x , [ 47 ] Co 20 Cr 26 Fe 20 Mn 20 Ni 14 , [ 45 ] CoCrFeNi, [ 45,48,53–58 ] CoCrNi, [ 49–52 ] Co 26 Cr 18.5 Fe 18.5 Mn 18.5 Ni 18.5 , [ 45 ] CoCuFeMnNi, [ 85,86 ] CoCuFeNi, [ 87 ] CoFeMnNi, [ 85 ] FeCoCrNi, [ 45,58 ] FeMnNi, [ 85 ] and 316 stainless steels. [ 59–66 ] The referenced three‐time line is included in each image.…”

Section: Resultsmentioning

confidence: 99%

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Correlating Strength and Hardness of High‐Entropy Alloys

Tian

et al. 2021

Adv Eng Mater

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Strength and hardness of metallic materials are reported to correlate in a specified form. Among various equations, yield strength is generally converted from Vickers hardness (HV) via a three‐time relation due to the simple and nondestructive nature of hardness testing. Herein, a through literature review is made and data of strength and HV for face‐centered cubic (FCC) and body‐centered cubic (BCC) high‐entropy alloys (HEA) are collected. The yield strength and HV visibly deviate from the three‐time relation, but the ultimate tensile strength and HV roughly follow the three‐time relation. New linear relationships, which are universally applied to convert HV to yield strength and ultimate tensile strength, are proposed.

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σ_{YS}

σ_{UTS}

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Correlating Strength and Hardness of High‐Entropy Alloys

Tian

et al. 2021

Adv Eng Mater

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“…Additive manufacturing using lasers has been attracting more and more interest in both academia and industry applications for processing high-value-added components. Power-blown and wire-fed laser-aided additive manufacturing (LAAM) has shown great potential in surface modification, repair, as well as 3D printing advanced materials [17][18][19][20][21]. Compared with powder feeding, coaxial wire feeding has advantages in processing materials with low melting points [22][23][24][25][26][27][28], such as aluminum and magnesium alloys, to avoid explosions when using powders.…”

Section: Of 17mentioning

confidence: 99%

Multiphysics Modeling, Sensitivity Analysis, and Optical Performance Optimization for Optical Laser Head in Additive Manufacturing

et al. 2021

Self Cite

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Optical laser head is a key component used to shape the laser beam and to deliver higher power laser irradiation onto workpieces for material processing. A focused laser beam size and optical intensity need to be controlled to avoid decreasing beam quality and loss of intensity in laser material processing. This paper reports the multiphysics modeling of an in-house developed laser head for laser-aided additive manufacturing (LAAM) applications. The design of computer experiments (DoCE) combined with the response surface model was used as an efficient design approach to optimize the optical performance of a high power LAAM head. A coupled structural-thermal-optical-performance (STOP) model was developed to evaluate the influence of thermal effects on the optical performance. A number of experiments with different laser powers, laser beam focal plane positions, and environmental settings were designed and simulated using the STOP model for sensitivity analysis. The response models of the optical performance were constructed using DoCE and regression analysis. Based on the response models, optimal design settings were predicted and validated with the simulations. The results show that the proposed design approach is effective in obtaining optimal solutions for optical performance of the laser head in LAAM.

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“…Additive manufacturing (AM) has gained tremendous attention in industry and academia due to its advantages over conventional subtractive manufacturing processes in terms of its complex geometry and near net shape fabrication. Fusion-based AM is one of the most popular techniques applied in engineering applications, including selective laser melting (SLM) [1,2], electron beam melting (EBM) [3], laser metal deposition (LMD), [4,5] and wire arc additive manufacturing (WAAM) [6,7]. Among these AM processes, WAAM is a variation of a direct energy deposition technology using cost efficient production resources.…”

Section: Introductionmentioning

confidence: 99%

Effect of Interpass Temperature on Wire Arc Additive Manufacturing Using High-Strength Metal-Cored Wire

Zhai

Wu²,

Zhou

2022

Metals

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Wire arc additive manufacturing (WAAM) is suitable to fabricate large components because of its high deposition rate. In this study, a metal-cored low-alloy high-strength welding filler metal was used as feedstock. Single wall structures were prepared using the WAAM process with different interpass temperatures (150 °C, 350 °C, and 600 °C). No obvious microstructure change was observed when the alloy was deposited with the interpass temperatures of 150 °C and 350 °C. Electron backscattered diffraction analysis shows that that no significant texture is developed in the samples. The yield strength tends to decrease with the increase in interpass temperature; however, the influence is insignificant. The highest ultimate tensile strength is found at the interpass temperature of 350 °C. A higher interpass temperature can lead to a higher deposition rate because of the shorter waiting time for the cooling of the earlier deposited layer. It was found that the upper limit interpass temperature for WAAM of the low-alloy high-strength steel is 350 °C. When a higher interpass temperature of 600 °C was used, collapse of the deposited materials was observed.

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Excellent combination of strength and ductility of CoCrNi medium entropy alloy fabricated by laser aided additive manufacturing

Cited by 22 publications

References 51 publications

Correlating Strength and Hardness of High‐Entropy Alloys

Correlating Strength and Hardness of High‐Entropy Alloys

Multiphysics Modeling, Sensitivity Analysis, and Optical Performance Optimization for Optical Laser Head in Additive Manufacturing

Effect of Interpass Temperature on Wire Arc Additive Manufacturing Using High-Strength Metal-Cored Wire

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