Investigating the influence of Ti powder purity on phase evolution during NiTi sintering using in-situ neutron diffraction

2017 ◽  
Vol 83 ◽  
pp. 43-54 ◽  
Author(s):  
Daniel R. Cluff ◽  
Stephen F. Corbin ◽  
Michael A. Gharghouri
Keyword(s):  
Neutron Diffraction ◽  
Phase Evolution ◽  
Ti Powder ◽  
In Situ Neutron Diffraction

scholarly journals Monitoring the phase evolution in LiCoO 2 electrodes during battery cycles using in‐situ neutron diffraction technique

2019 ◽  
Vol 67 (3) ◽  
pp. 344-352 ◽  
Author(s):  
Anirudha Jena ◽  
Po‐Han Lee ◽  
Wei Kong Pang ◽  
Kuang‐Che Hsiao ◽  
Vanessa K. Peterson ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Phase Evolution ◽  
In Situ Neutron Diffraction ◽  
Neutron Diffraction Technique

Optimising Sintering in Metal Injection Moulding Using In Situ Neutron Diffraction

2012 ◽  
Vol 706-709 ◽  
pp. 1737-1742 ◽  
Author(s):  
D.J. Goossens ◽  
R.E. Whitfield ◽  
A.J. Studer
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Neutron Diffraction ◽  
Injection Moulding ◽  
Phase Evolution ◽  
Rietveld Analysis ◽  
Formation Temperature ◽  
Lower Temperature ◽  
In Situ Neutron Diffraction

The phase evolution during the sintering of metal injection moulded stainless steel, 316Land 17-4PH, has been observed using in situ neutron diffraction and Rietveld analysis. The formationof the ferrite phase in the final product is associated with the production of -ferrite at high temperatures.Coexistence of phases at high temperature is thought to allow the segregation of alloyingelements, stabilising the ferrite to lower temperature. To prevent ferrite in the final products the sinteringmust occur at a lower temperature than that at which -ferrite is formed. An alternative regimeis proposed in which the temperature would be cycled around the formation temperature of -ferrite.

scholarly journals Coexistence of Two Cubic-Lattice Co Matrices at High Temperatures in Co-Re-Cr-Ni Alloy Studied by Neutron Diffraction

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Přemysl Beran ◽  
Debashis Mukherji ◽  
Pavel Strunz ◽  
Ralph Gilles ◽  
Markus Hölzel ◽  
...  
Keyword(s):  
High Temperature ◽  
Neutron Diffraction ◽  
Diffusion Processes ◽  
Phase Evolution ◽  
Ni Alloy ◽  
The Matrix ◽  
The Face ◽  
Fcc Phase ◽  
In Situ Neutron Diffraction

In situ neutron diffraction measurements were performed during heating to high temperature and cooling for a Co-17Re-23Cr-25Ni alloy. The allotropic transformation of the Co matrix and the evolution of the low-temperature hexagonal and high-temperature cubic Co phases were studied. A surprising observation was the splitting of the face-centred cubic (fcc) Co phase peaks at high temperature during heating as well as cooling. The phase evolution was monitored, and an appearance of the secondary fcc phase could be linked to the formation of σ phase (Cr2Re3 type) associated with a compositional change in the matrix due to diffusion processes at high temperature.

Deformation Behaviour of TRIP Steel Monitoring by in-Situ Neutron Diffraction

2011 ◽  
Vol 465 ◽  
pp. 390-394 ◽  
Author(s):  
Jozef Zrník ◽  
Ondrej Muránsky ◽  
Petr Šittner ◽  
E.C. Oliver
Keyword(s):  
Neutron Diffraction ◽  
Trip Steel ◽  
Retained Austenite ◽  
Volume Fraction ◽  
Tensile Deformation ◽  
Deformation Behaviour ◽  
Tensile Load ◽  
Phase Evolution ◽  
In Situ Neutron Diffraction

The paper presents results of in-situ neutron diffraction experiments aimed on monitoring the phase evolution and load distribution in TRIP steel when subjected to tensile loading. Tensile deformation behaviour of TRIP steel with different initial microstructures showed that the applied tensile load is redistributed at the yield point and the harder retained austenite (Feγ) bears larger load then ferrite (Feα) matrix. After load partioning is finished, macroscopic yielding comes through simultaneous activity of the martensite transformation (in the austenite) and plastic deformation process in ferrite. The steel with higher volume fraction of retained austenite and less stronger ferrite appears to be a better TRIP steel having efficient structure for better plasticity purpose.

In Situ Neutron Diffraction Studies of Phase Transformations in Si - Mn TRIP Steel

2005 ◽  
Vol 490-491 ◽  
pp. 275-280
Author(s):  
O. Muránsky ◽  
Petr Lukáš ◽  
Petr Šittner ◽  
Jozef Zrník ◽  
P. Jenčuš ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Trip Steel ◽  
High Strength ◽  
Phase Evolution ◽  
In Situ Monitoring ◽  
Trip Steels ◽  
Bainite Microstructure ◽  
In Situ Neutron Diffraction ◽  
Strength And Ductility

High strength and ductility of the TRIP steels is often attributed to the transformation induced plasticity effect resulting from the strain induced martensitic transformation of the retained austenite in the bainite microstructure. The present work reports results of in-situ neutron diffraction experiments focused on monitoring the phase evolution in two TRIP steel samples (two different thermomechanical treatments) subjected to tensile loading at room temperature. Comparison of the single lineprofile analysis of reactor data (TKSN-400 at NPI Rez) and multi lineprofile analysis of data obtained at spallation neutron source (diffractometer ENGIN-X at ISIS RAL Chilton) suggests that the former can be used in the first approximation for in-situ monitoring of the phase evolution in TRIP steels subjected to mechanical loads.

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