TRIP Steel Deformation Behavior by Neutron Diffraction

ABSTRACTDeformation behaviors of two TRIP-type multiphase steels with different carbon contents were studied by in situ neutron diffraction measurement during tensile deformation at RT. The tensile test was conducted in a step-load controlling manner during the elastic region, and in a continuous manner with a constant crosshead speed by an initial strain rate of 1.8×10-5 s-1 during the plastic region. Austenite grains were observed to bear higher phase stresses than ferrite grains in both steels. Austenite peak intensities started to decrease at the onsets of plastic deformation in both steels, showing the occurrence of stress induced martensitic transformations. Martensite peaks were carefully analyzed to estimate phase strains, and as the results martensite grains were found to bear largest phase stresses during plastic deformation.

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410 In-situ neutron diffraction measurement during compressive and tensile deformation in Ferritic steel

The Proceedings of Ibaraki District Conference ◽

10.1299/jsmeibaraki.2015.23.147 ◽

2015 ◽

Vol 2015.23 (0) ◽

pp. 147-148

Author(s):

Toru SUGAWARA ◽

Kazuhisa ONIZAWA ◽

Tatsuya NAGAOKA ◽

Miyuri KAMEYA ◽

Tetsuya SUZUKI

Keyword(s):

Neutron Diffraction ◽

Ferritic Steel ◽

Tensile Deformation ◽

Diffraction Measurement ◽

Neutron Diffraction Measurement ◽

In Situ Neutron Diffraction

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On the Development of Grain-Orientation-Dependent and Inter-Phase Stresses in a Super Duplex Stainless Steel under Uniaxial Loading

Materials Science Forum ◽

10.4028/www.scientific.net/msf.524-525.917 ◽

2006 ◽

Vol 524-525 ◽

pp. 917-922 ◽

Cited By ~ 4

Author(s):

Ru Lin Peng ◽

Yan Dong Wang ◽

Guo Cai Chai ◽

Nan Jia ◽

Sten Johansson ◽

...

Keyword(s):

Plastic Deformation ◽

Stainless Steel ◽

Neutron Diffraction ◽

Grain Orientation ◽

Super Duplex Stainless Steel ◽

Lattice Strains ◽

Duplex Steel ◽

In Situ Neutron Diffraction ◽

Phase Stresses

Microstresses due to intergranular and inter-phase interactions in an austenitic-ferritic super duplex steel (SAF 2507) under uniaxial compressive deformation have been studied by in-situ neutron diffraction experiments. Lattice strains of several hkl planes of austenite respective ferrite were mapped as a function of sample direction at a number of load levels during loading into the plastic regime and unloading. The analysis of the experimental results has shown that during loading both grain-orientation-dependent and inter-phase stresses were generated under plastic deformation that was inhomogeneous at the microstructural level. Residual stresses depending on the grain-orientation and phase have been found after unloading. The results also indicate stronger intergranular interactions among the studied hkl planes of austenite than those of ferrite.

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

Science Advances ◽

10.1126/sciadv.aaz4748 ◽

2020 ◽

Vol 6 (37) ◽

pp. eaaz4748 ◽

Cited By ~ 2

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.

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