Abstract
The effect of weld thermal cycling on titanium nitride stability in a range of normalized Timicroalloyed steels containing various alloying additions of V, Al, and N has been investigated. Nitride dispersions and the chemical analysis of individual particles are studied using transmission electron microscopy and a quantitative 200 kV STEM-EDX-EELS microanalysis system. It is found that whereas the normalized material contains various nitrides of mixed compositions, only nitrides based on TiN survive high energy simulated weld cycles. Grain growth in weld cycled material is highly dependent upon the stability of nitrides during the weld cycle, and this stability depends on the original composition of the nitrides and hence of the steel itself. The presence of aluminum in the particles is particularly detrimental in this respect. The best grain growth control and highest toughness are found in steels based on optimum ratios of Ti/V/N and on low Al levels. The possible way in which the steel’s composition affects particle stability and hence grain growth during weld thermal cycles is discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
