Microstructure and nanoindentation creep behavior of CoCrFeMnNi high-entropy alloy fabricated by selective laser melting
Source abstract
Abstract
Abstract Selective laser melting (SLM) was used to fabricate an equiatomic CoCrFeMnNi high-entropy alloy (HEA). The SLM-fabricated CoCrFeMnNi HEA samples were studied with X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), electron backscatter diffraction (EBSD) and nanoindentation techniques to characterize the microstructure and creep behavior. It was found that the HEA comprised a single face-centered cubic (fcc) structure. Due to the fast solidification and high temperature gradients of the molten pool during the SLM process, the microstructure comprised cellular subgrains with grain boundary angles lower than 5°. Based on energy dispersive spectrometry (EDS) maps, the constituent elements of the SLM-fabricated HEA were homogenously distributed. Moreover, the effect of the peak holding load on the nanoindentation creep deformation of the SLM-fabricated HEA was investigated using a Berkovich indenter. The results of this study indicated that the creep was mainly dominated by deformation controlled by dislocation motion.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · High Entropy Alloys Studies · High-Temperature Coating Behaviors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. Microstructural development in equiatomic multicomponent alloys10.1016/j.msea.2003.10.257 ↗
2. Nanostructured high-entropy alloys with multiple principal elements: novel alloy design concepts and outcomes10.1002/adem.200300567 ↗
3. Nano-twin mediated plasticity in carbon-containing FeNiCoCrMn high entropy alloys10.1016/j.jallcom.2015.05.224 ↗
4. Phase stability of non-equiatomic CoCrFeMnNi high entropy alloys10.1016/j.actamat.2015.07.030 ↗
5. Microstructure evolution and critical stress for twinning in the CrMnFeCoNi high-entropy alloy10.1016/j.actamat.2016.07.038 ↗
6. Deposition of FeCoNiCrMn high entropy alloy (HEA) coating via cold spraying10.1016/j.jmst.2018.12.015 ↗
7. Formation of core–shell structure in high entropy alloy coating by laser cladding10.1016/j.apsusc.2015.12.059 ↗
8. Enhanced hardness and fracture toughness of the laser-solidified FeCoNiCrCuTiMoAlSiB0.5 high-entropy alloy by martensite strengthening10.1016/j.scriptamat.2013.05.020 ↗
9. Structure and properties of ultrafine-grained CoCrFeMnNi high-entropy alloys produced by mechanical alloying and spark plasma sintering10.1016/j.jallcom.2016.12.010 ↗
10. High density net shape components by direct laser re-melting of single-phase powders10.1023/A:1016185606642 ↗
11. Laser additive manufacturing of metallic components: materials, processes and mechanisms10.1179/1743280411Y.0000000014 ↗
12. Reducing porosity in AlSi10Mg parts processed by selective laser melting
13. 3D printing of high-strength aluminium alloys10.1038/nature23894 ↗
14. Characterization of bending vibration fatigue of SLM fabricated Ti-6Al-4V10.1016/j.ijfatigue.2017.02.005 ↗
15. Correlation of selective laser melting-melt pool events with the tensile properties of Ti-6Al-4V ELI processed by laser powder bed fusion
16. Microstructure and yield strength of SLM-fabricated CM247LC Ni-Superalloy10.1016/j.actamat.2017.02.007 ↗
17. Microstructure evolution induced by inoculants during the selective laser melting of IN718
18. Additively manufactured hierarchical stainless steels with high strength and ductility10.1038/nmat5021 ↗
19. Fabrication of Co–Cr–Mo endoprosthetic ankle devices by means of Selective Laser Melting (SLM)10.1016/j.matdes.2016.05.083 ↗
20. Selective laser melting of an equiatomic CoCrFeMnNi high-entropy alloy: processability, non-equilibrium microstructure and mechanical property10.1016/j.jallcom.2018.02.298 ↗
21. Hierarchical microstructure and strengthening mechanisms of a CoCrFeNiMn high entropy alloy additively manufactured by selective laser melting10.1016/j.scriptamat.2018.05.015 ↗
22. Sluggish diffusion in Co–Cr–Fe–Mn–Ni high-entropy alloys10.1016/j.actamat.2013.04.058 ↗
23. Structural and thermodynamic factors of suppressed interdiffusion kinetics in multi-component high-entropy materials10.1038/srep04162 ↗
24. Indentation scale dependence of tip-in creep behavior in Ni thin films10.1016/j.scriptamat.2008.03.014 ↗
25. Nanoindentation characterized initial creep behavior of a high-entropy-based alloy CoFeNi10.1016/j.intermet.2014.05.007 ↗
26. Indentation creep revisited10.1557/jmr.2011.213 ↗
27. Nanoindentation creep of tin and aluminium: a comparative study between constant load and constant strain rate methods10.1016/j.msea.2011.11.016 ↗
28. Effect of hydrogen and strain rate on nanoindentation creep of austenitic stainless steel10.1016/j.ijhydene.2018.11.017 ↗
29. Spherical nanoindentation creep behavior of nanocrystalline and coarse-grained CoCrFeMnNi high-entropy alloys10.1016/j.actamat.2016.02.049 ↗
30. Nanoindentation creep behavior in a CoCrFeCuNi high-entropy alloy film with two different structure states10.1016/j.msea.2014.10.065 ↗
31. Nanoindentation study on the creep characteristics of high-entropy alloy films: fcc versus bcc structures10.1016/j.ijrmhm.2015.08.010 ↗
32. Three-dimensional visualization in powder diffraction10.4028/www.scientific.net/SSP.130.15 ↗
33. VESTA: a three-dimensional visualization system for electronic and structural analysis10.1107/S0021889808012016 ↗
34. In vitro biocompatibility of CoCrMo dental alloys fabricated by selective laser melting10.1016/j.dental.2014.02.008 ↗
35. The influence of processing parameters on the mechanical properties of SLM parts10.1016/j.proeng.2015.01.510 ↗
36. The relationship between indentation and uniaxial creep in amorphous selenium10.1557/JMR.1995.2024 ↗
37. Size effects of nanoindentation creep10.1557/jmr.2004.19.2.513 ↗
38. An examination of the breakdown in creep by viscous glide in solid solution alloys at high stress levels10.1016/0001-6160(82)90139-0 ↗
39. Fifty years of Harper–Dorn creep: a viable creep mechanism or a Californian artifact?10.1007/s10853-006-0782-4 ↗