التفاصيل البيبلوغرافية
| العنوان: |
Effect of Nb on inclusions and phase transformation in simulated high heat input coarse-grain HAZ of Nb/Ti low carbon microalloyed steel. |
| المؤلفون: |
Yang, Yulong1 (AUTHOR), Jia, Xiao2 (AUTHOR), Ma, Yaxin2 (AUTHOR), Wang, Ping1 (AUTHOR) wang20211107@126.com, Zhu, Fuxian2 (AUTHOR) |
| المصدر: |
Materials Characterization. Jul2022, Vol. 189, pN.PAG-N.PAG. 1p. |
| مستخلص: |
In this paper, two groups of Nb/Ti low carbon microalloyed steels (Nb-bearing and Nb-free) were obtained through laboratorial methods. The evolution and effect of Nb/Ti-containing complex inclusions were characterised and analysed after being subjected to high heat input thermal simulation of 100 kJ/cm. The results showed that the prior austenite grain size in the coarse grain heat-affected zone (CGHAZ) was not affected by 0.045 wt% Nb addition. However, the acicular ferrite nucleation, induced by effective micron-level inclusions, was inhibited. Nb tended to converge towards the interfaces between the micron-level inclusions and matrix, which had a negative effect on the nucleation potential of acicular ferrite. The re-precipitation behaviour of nano-level inclusions satisfied the dynamic conditions during the high heat input thermal cycle, under which the dislocation movement was inhibited due to the pinning effect of re-precipitation particles. Besides, the size, morphology and composition of nano-level precipitates were changed by Nb (0.045 wt%) addition. In general, the evolution and effect of inclusions in simulated high heat input CGHAZ provide theoretical references for the study of welding performance in Nb/Ti low carbon microalloyed steels. • Nb segregation at the interface between micron inclusion and matrix affects the nucleation of acicular ferrite. • The acicular ferrite nucleation induced by effective inclusions is inhibited by a certain amount of Nb. • The size, morphology and even composition of the nano-level inclusions in CGHAZ are changed by 0.045wt%Nb addition. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |
