Effects of annealing on the structure and mechanical properties of FeCoCrNi high-entropy alloy fabricated via selective laser melting

Lin, Danyang; Xu, Lianyong; Jing, Hongyang; Han, Yongdian; Zhao, Lei; Minami, Fumiyoshi

doi:10.1016/j.addma.2020.101058

Cited by 64 publications

(53 citation statements)

References 36 publications

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“…[95][96][97][98][99][100][101] The HEA parts are mainly manufactured via a casting process, which severely restricts the geometric freedom. [102] In addition, the machining process of HEAs is rather challenging due to their high hardness. [102] In recent years, AM manufacturing processes have been successfully used to print HEA parts.…”

Section: Properties Of High-entropy Alloys (Heas) Fabricated Via Slmmentioning

confidence: 99%

“…[ 110 ] Lin et al investigated the effect of the annealing temperature on the microstructure and mechanical properties of an SLM FeCoCrNi HEA. [ 102 ] The authors found that increasing the annealing temperature leads to a gradual decrease in yield strength and an increase in plasticity.…”

Section: Properties Of High‐entropy Alloys (Heas) Fabricated Via Slmmentioning

confidence: 99%

“…[ 102 ] In addition, the machining process of HEAs is rather challenging due to their high hardness. [ 102 ] In recent years, AM manufacturing processes have been successfully used to print HEA parts. [ 103 ] SLM attracts much research attention in this field as it offers the advantage of producing complex geometries with improved functionalities.…”

Section: Properties Of High‐entropy Alloys (Heas) Fabricated Via Slmmentioning

confidence: 99%

See 2 more Smart Citations

A Review of the Selective Laser Melting Lattice Structures and Their Numerical Models

Alomar

Concli

2020

Adv Eng Mater

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Section: Properties Of High-entropy Alloys (Heas) Fabricated Via Slmmentioning

confidence: 99%

Section: Properties Of High‐entropy Alloys (Heas) Fabricated Via Slmmentioning

confidence: 99%

Section: Properties Of High‐entropy Alloys (Heas) Fabricated Via Slmmentioning

confidence: 99%

See 1 more Smart Citation

A Review of the Selective Laser Melting Lattice Structures and Their Numerical Models

Alomar

Concli

2020

Adv Eng Mater

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show abstract

“…The occurrence of the fcc annealing twins was expected to cause planar slip during the tensile test [ 19 ]. Without the presence of annealing twins, the fcc α-phase alloy is expected to have high elongation since annealing twins lead to the aggregation of the dislocations [ 20 ]. This would be further discussed in the subsection of mechanical properties.…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties Enhancement of the Au-Cu-Al Alloys via Phase Constitution Manipulation

et al. 2021

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To enhance the mechanical properties (e.g., strength and elongation) of the face-centered cubic (fcc) α-phase in the Au-Cu-Al system, this study focused on the introduction of the martensite phase (doubled B19 (DB19) crystal structure of Au2CuAl) via the manipulation of alloy compositions. Fundamental evaluations, such as microstructure observations, phase identifications, thermal analysis, tensile behavior examinations, and reflectance analysis, have been conducted. The presence of fcc annealing twins was observed in both the optical microscope (OM) and the scanning electron microscope (SEM) images. Both strength and elongation of the alloys were greatly promoted while the DB19 martensite phase was introduced into the alloys. Amongst all the prepared specimens, the 47Au41Cu12Al and the 44Au44Cu12Al alloys performed the optimized mechanical properties. The enhancement of strength and ductility in these two alloys was achieved while the stress plateau was observed during the tensile deformation. A plot of the ultimate tensile strength (UTS) against fracture strain was constructed to illustrate the effects of the introduction of the DB19 martensite phase on the mechanical properties of the alloys. Regardless of the manipulation of the alloy compositions and the introduction of the DB19 martensite phase, the reflectance stayed almost identical to pure Au.

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“…Regarding the CA alloy, Johnson et al [23] investigated the fabrication condition by creating a process map. The strengthening mechanism of microstructure and the effect of heat treatment on the microstructure and mechanical properties of the alloy were investigated [24][25][26][27][28][29][30][31][32][33]. Shiratori et al [34] studied the relationship between microstructures and mechanical properties of the AlCoCrFeNi HEA formed by the electron beam powder bed fusion (EPBF) process.…”

Section: Introductionmentioning

confidence: 99%

Influences of Process Parameters on the Microstructure and Mechanical Properties of CoCrFeNiTi Based High-Entropy Alloy in a Laser Powder Bed Fusion Process

et al. 2021

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Recently, high-entropy alloys (HEAs) have attracted much attention because of their superior properties, such as high strength and corrosion resistance. This study aimed to investigate the influences of process parameters on the microstructure and mechanical properties of CoCrFe NiTiMo HEAs using a laser-based powder bed fusion (LPBF) process. In terms of laser power and scan speed, a process map was constructed by evaluating the density and surface roughness of the as-built specimen to optimize the process parameters of the products. The mechanical properties of the as-built specimens fabricated at the optimum fabrication condition derived from the process map were evaluated. Consequently, the optimum laser power and scan speed could be obtained using the process map evaluated by density and surface roughness. The as-built specimen fabricated at the optimum fabrication condition presented a relative density of more than 99.8%. The microstructure of the as-built specimen exhibited anisotropy along the build direction. The tensile strength and elongation of the as-built specimen were around 1150 MPa and more than 20%, respectively.

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Effects of annealing on the structure and mechanical properties of FeCoCrNi high-entropy alloy fabricated via selective laser melting

Cited by 64 publications

References 36 publications

A Review of the Selective Laser Melting Lattice Structures and Their Numerical Models

A Review of the Selective Laser Melting Lattice Structures and Their Numerical Models

Mechanical Properties Enhancement of the Au-Cu-Al Alloys via Phase Constitution Manipulation

Influences of Process Parameters on the Microstructure and Mechanical Properties of CoCrFeNiTi Based High-Entropy Alloy in a Laser Powder Bed Fusion Process

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