Crystallography and hydrogen trapping of alloy carbides in steel

Fu Gao Wei, Kaneaki Tsuzaki

Research output: Contribution to conferencePaper

Abstract

The orientation relationship (OR) between MX-type alloy carbides and α- or γ- iron has been predicted based on the elastic strain energy theory and studied by means of high-resolution transmission electron microscopy (HRTEM). The elastic strain energy theory predicted that VC, TiC and NbC hold the Baker-Nutting OR (B-N OR) with the body-centered-cubic (bcc) αFe while they do not adopt a cube-on-cube OR with the face-centered-cubic (fee) γFe. HRTEM observation of TiC precipitation in a 0.05C-0.20Ti-2.0Ni steel showed that TiC precipitate obeys the B-N OR with martensite in the samples tempered at 600 and 800°C, in good agreement with the prediction. However, precise measurement of lattice rotation using moiré pattern in addition to diffraction analysis indicated that deviation up to 5° from the exact B-N OR is common. TiC precipitates forming in austenite at high temperatures deviate significantly from the B-N OR and they are essentially incoherent with their martensite matrix which is produced by γ-α transformation during quenching. It was found by thermal desorption spectrometry (TDS) analysis that the coherency of TiC precipitate plays a very important role in hydrogen trapping with respect to hydrogen capacity, interaction energy with hydrogen and the trap site of hydrogen.

Original languageEnglish
Pages235-246
Number of pages12
Publication statusPublished - Dec 1 2005
EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005 - Phoenix, AZ, United States
Duration: May 29 2005Jun 3 2005

Other

OtherInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005
CountryUnited States
CityPhoenix, AZ
Period5/29/056/3/05

Fingerprint

Crystallography
Carbides
Precipitates
Hydrogen
Steel
High resolution transmission electron microscopy
Strain energy
Martensite
Thermal desorption
Austenite
Spectrometry
Quenching
Diffraction
Iron
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Wei, F. G., & Tsuzaki, K. (2005). Crystallography and hydrogen trapping of alloy carbides in steel. 235-246. Paper presented at International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005, Phoenix, AZ, United States.

Crystallography and hydrogen trapping of alloy carbides in steel. / Wei, Fu Gao; Tsuzaki, Kaneaki.

2005. 235-246 Paper presented at International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005, Phoenix, AZ, United States.

Research output: Contribution to conferencePaper

Wei, FG & Tsuzaki, K 2005, 'Crystallography and hydrogen trapping of alloy carbides in steel' Paper presented at International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005, Phoenix, AZ, United States, 5/29/05 - 6/3/05, pp. 235-246.
Wei FG, Tsuzaki K. Crystallography and hydrogen trapping of alloy carbides in steel. 2005. Paper presented at International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005, Phoenix, AZ, United States.
Wei, Fu Gao ; Tsuzaki, Kaneaki. / Crystallography and hydrogen trapping of alloy carbides in steel. Paper presented at International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005, Phoenix, AZ, United States.12 p.
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