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Absence of strain-induced precipitation of NbC is observed in a conventional hot rolled Nb-Ti microalloyed X90 strip. Quantitative analysis using transmission electron microscopy and 3D atom probe tomography indicates that epitaxial growth of NbC on pre-existing TiN particles with a short inter-particle spacing of 300±65nm suppresses the occurrence of strain-induced precipitation of NbC on dislocations...
A series of fundamental and applied investigations were carried out to develop high grade pipeline steel with high Mn high Nb design, and it mostly focused on that the static and dynamic recrystallization behaviors of high Mn high Nb pipeline steel. Various experimental methods were adopted, which include stress relaxation tests, physical metallurgical modeling analysis, the etching of prior austenite...
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