In situ observation of the formation of TiC from the elements by neutron diffraction

304 stainless steel is one of the most common stainless steels due to its excellent corrosion resistance and mechanical properties. Typically, a good balance between ductility and strength derives from deformation-induced martensite transformation (DIMT), but this mechanism has not been fully explained. In this study, we conducted in situ neutron diffraction measurements during the tensile deformation of commercial 304 stainless steel (at room temperature) by means of a Time-Of-Flight type neutron diffractometer, iMATERIA (BL20), at J-PARC MLF (Japan Proton Accelerator Research Complex, Materials and Life Science Experimental Facility), Japan. The fractions of α′-(BCC) and ε-(HCP) martensite were quantitatively determined by Rietveld-texture analysis, as well as the anisotropic microstrains. The strain hardening behavior corresponded well to the microstrain development in the austenite phase. Hence, the authors concluded that the existence of martensite was not a direct cause of hardening, because the dominant austenite phase strengthened to equivalent values as in the martensite phase. Moreover, the transformation-induced plasticity (TRIP) mechanism in austenitic steels is different from that of low-alloy bainitic TRIP steels.

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In Situ Observation of Phase Transformation of Powder Sintering from Ni/TiH2 Using Neutron Diffraction

TMS 2014: 143rd Annual Meeting & Exhibition ◽

10.1007/978-3-319-48237-8_114 ◽

2014 ◽

pp. 967-973

Author(s):

Gang Chen ◽

Klaus-Dieter Liss ◽

Peng Cao

Keyword(s):

Phase Transformation ◽

Neutron Diffraction ◽

In Situ Observation ◽

Powder Sintering

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In situ observation of ErD2 formation during D2 loading via neutron diffraction

Powder Diffraction ◽

10.1154/1.3582804 ◽

2011 ◽

Vol 26 (2) ◽

pp. 144-148

Author(s):

Mark A. Rodriguez ◽

Clark S. Snow ◽

Ryan R. Wixom ◽

Anna Llobet ◽

James F. Browning

Keyword(s):

Solid Solution ◽

Neutron Diffraction ◽

Structural Changes ◽

Solution Phase ◽

Fluorite Phase ◽

Solid Solution Phase ◽

In Situ Observation ◽

Complete Conversion ◽

Tetrahedral Sites

In an effort to better understand the structural changes occurring during hydrogen loading of erbium target materials, we have performed in situ D2 loading of erbium metal (powder) at temperature (450°C) with simultaneous neutron diffraction analysis. This experiment tracked the conversion of Er metal to the α erbium deuteride (solid-solution) phase and then into the β (fluorite) phase. Complete conversion to ErD2.0 was accomplished at 10 Torr D2 pressure with deuterium fully occupying the tetrahedral sites in the fluorite lattice.

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In situ observation of texture evolution during α→β and β→α phase transformations in titanium alloys investigated by neutron diffraction

Acta Materialia ◽

10.1016/j.actamat.2007.06.017 ◽

2007 ◽

Vol 55 (17) ◽

pp. 5718-5727 ◽

Cited By ~ 126

Author(s):

I. Lonardelli ◽

N. Gey ◽

H.-R. Wenk ◽

M. Humbert ◽

S.C. Vogel ◽

...

Keyword(s):

Neutron Diffraction ◽

Titanium Alloys ◽

Phase Transformations ◽

Texture Evolution ◽

In Situ Observation ◽

Α Phase

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ChemInform Abstract: In situ Observation of the Reaction of Scandium and Carbon by Neutron Diffraction.

ChemInform ◽

10.1002/chin.201050009 ◽

2010 ◽

Vol 41 (50) ◽

pp. no-no

Author(s):

Erick A. Juarez-Arellano ◽

Bjorn Winkler ◽

Sven C. Vogel ◽

Anatoliy Senyshyn ◽

Daniel R. Kammler ◽

...

Keyword(s):

Neutron Diffraction ◽

In Situ Observation

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In situ observation of the magnetocaloric effect through neutron diffraction in the Tb(DCO2)3 and TbODCO3 frameworks

Journal of Materials Chemistry C ◽

10.1039/d0tc03153d ◽

2020 ◽

Vol 8 (35) ◽

pp. 12123-12132

Author(s):

Richard J. C. Dixey ◽

Pascal Manuel ◽

Fabio Orlandi ◽

Paromita Mukherjee ◽

Siân E. Dutton ◽

...

Keyword(s):

Neutron Diffraction ◽

Magnetocaloric Effect ◽

Entropy Change ◽

In Situ Observation ◽

Next Generation ◽

Change Mechanism ◽

Entropy Changes ◽

Magnetocaloric Materials

Understanding large entropy changes in efficient magnetocaloric materials is essential to design next-generation magnetocaloric devices. We report the large entropy change mechanism in two efficient magnetocaloric materials – TbODCO3 and Tb(DCO2)3.

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In situ observation of the tetragonal–cubic phase transition in the CeZrO4 solid solution – a high-temperature neutron diffraction study

Acta Crystallographica Section B Structural Science ◽

10.1107/s0108768107007720 ◽

2007 ◽

Vol 63 (3) ◽

pp. 384-389 ◽

Cited By ~ 17

Author(s):

Takahiro Wakita ◽

Masatomo Yashima

Keyword(s):

Phase Transition ◽

Solid Solution ◽

Neutron Diffraction ◽

Axial Ratio ◽

Rietveld Analysis ◽

Atomic Displacement ◽

Cubic Phase ◽

In Situ Observation ◽

Space Group

The crystal structure of the compositionally homogeneous ceria–zirconia solid solution CeZrO4 is refined by Rietveld analysis of neutron diffraction data measured in situ over the temperature range 296–1831 K. The CeZrO4 exhibits a tetragonal structure with the space group P42/nmc at temperatures from 296 to 1542 K (Z = 1), and a cubic fluorite-type form with the space group Fm\overline 3 m at 1831 K (Z = 2). The isotropic atomic displacement parameters of Ce and Zr atoms B(Ce,Zr) and O atoms B(O) are found to increase with temperature, with B(O) being larger than B(Ce,Zr), suggesting the higher diffusivity of oxygen ions. The ratio of the c axial length to the a length of the pseudo-fluorite lattice (c/a F axial ratio) for the tetragonal CeZrO4 phase increased from 296 to 1034 K and decreased from 1291 to 1542 K, reaching unity between 1542 and 1831 K. The displacement of O atoms along the c axis in the tetragonal CeZrO4 phase increased from 296 to 1034 K and decreased from 1291 to 1542 K, reaching 0.0 Å between 1542 and 1831 K. These results indicate that the cubic-to-tetragonal phase transition between 1542 and 1831 K is accompanied by oxygen displacement along the c axis and the increase of the c/a F axial ratio from unity.

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