scholarly journals In situ neutron diffraction study on tensile deformation behavior of carbon-strengthened CoCrFeMnNi high-entropy alloys at room and elevated temperatures

2018 ◽  
Vol 33 (19) ◽  
pp. 3192-3203 ◽  
Author(s):  
Tingkun Liu ◽  
Yanfei Gao ◽  
Hongbin Bei ◽  
Ke An
Keyword(s):  
Deformation Behavior ◽  
Elevated Temperatures ◽  
Tensile Deformation ◽  
Neutron Diffraction Study ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Tensile Deformation Behavior ◽  
Image Position ◽  
In Situ Neutron Diffraction

Abstract

In-situ neutron diffraction study of deformation behavior of a multi-component high-entropy alloy

2014 ◽  
Vol 104 (5) ◽  
pp. 051910 ◽  
Author(s):  
Y. Wu ◽  
W. H. Liu ◽  
X. L. Wang ◽  
D. Ma ◽  
A. D. Stoica ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Deformation Behavior ◽  
Neutron Diffraction Study ◽  
High Entropy Alloy ◽  
High Entropy ◽  
In Situ Neutron Diffraction

scholarly journals Temperature dependence of elastic and plastic deformation behavior of a refractory high-entropy alloy

2020 ◽  
Vol 6 (37) ◽  
pp. eaaz4748 ◽  
Author(s):  
Chanho Lee ◽  
George Kim ◽  
Yi Chou ◽  
Brianna L. Musicó ◽  
Michael C. Gao ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Neutron Diffraction ◽  
Deformation Behavior ◽  
Elevated Temperatures ◽  
High Entropy ◽  
Plastic Deformation Behavior ◽  
Deformation Behaviors ◽  
In Situ Neutron Diffraction ◽  
Elastic And Plastic Deformation

Single-phase solid-solution refractory high-entropy alloys (HEAs) show remarkable mechanical properties, such as their high yield strength and substantial softening resistance at elevated temperatures. Hence, the in-depth study of the deformation behavior for body-centered cubic (BCC) refractory HEAs is a critical issue to explore the uncovered/unique deformation mechanisms. We have investigated the elastic and plastic deformation behaviors of a single BCC NbTaTiV refractory HEA at elevated temperatures using integrated experimental efforts and theoretical calculations. The in situ neutron diffraction results reveal a temperature-dependent elastic anisotropic deformation behavior. The single-crystal elastic moduli and macroscopic Young’s, shear, and bulk moduli were determined from the in situ neutron diffraction, showing great agreement with first-principles calculations, machine learning, and resonant ultrasound spectroscopy results. Furthermore, the edge dislocation–dominant plastic deformation behaviors, which are different from conventional BCC alloys, were quantitatively described by the Williamson-Hall plot profile modeling and high-angle annular dark-field scanning transmission electron microscopy.

scholarly journals Study on Microstructure and In Situ Tensile Deformation Behavior of Fe-25Mn-xAl-8Ni-C Alloy Prepared by Vacuum Arc Melting

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 814
Author(s):  
Yaping Bai ◽  
Meng Li ◽  
Chao Cheng ◽  
Jianping Li ◽  
Yongchun Guo ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Austenite Phase ◽  
Vacuum Arc ◽  
Al Content ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Tensile Deformation Behavior

In this study, Fe-25Mn-xAl-8Ni-C alloys (x = 10 wt.%, 11 wt.%, 12 wt.%, 13 wt.%) were prepared by a vacuum arc melting method, and the microstructure of this series of alloys and the in situ tensile deformation behavior were studied. The results showed that Fe-25Mn-xAl-8Ni-C alloys mainly contained austenite phase with a small amount of NiAl compound. With the content of Al increasing, the amount of austenite decreased while the amount of NiAl compound increased. When the Al content increased to 12 wt.%, the interface between austenite and NiAl compound and austenitic internal started to precipitate k-carbide phase. In situ tensile results also showed that as the content of Al increased, the alloy elongation decreased gradually, and the tensile strength first increased and then decreased. When the Al content was up to 11 wt.%, the elongation and tensile strength were 2.6% and 702.5 MPa, respectively; the results of in situ tensile dynamic observations show that during the process of stretching, austenite deformed first, and crack initiation mainly occurred at the interface between austenite and NiAl compound, and propagated along the interface, resulting in fracture of the alloy.

In situ neutron diffraction study of fatigue behavior of CrFeCoNiMo0.2 high entropy alloy

2021 ◽  
Vol 139 ◽  
pp. 107371
Author(s):  
Haiyan He ◽  
Bing Wang ◽  
Dong Ma ◽  
Alexandru D. Stoica ◽  
Zhenduo Wu ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Fatigue Behavior ◽  
Neutron Diffraction Study ◽  
High Entropy Alloy ◽  
High Entropy ◽  
In Situ Neutron Diffraction

Deformation behavior of nanocrystalline and ultrafine-grained CoCrCuFeNi high-entropy alloys

2019 ◽  
Vol 34 (5) ◽  
pp. 720-731 ◽  
Author(s):  
Seungjin Nam ◽  
Jun Yeon Hwang ◽  
Jonggyu Jeon ◽  
Jihye Park ◽  
Donghyun Bae ◽  
...  
Keyword(s):  
Deformation Behavior ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Ultrafine Grained ◽  
Image Position

Abstract

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