Small-angle neutron scattering reveals the effect of Mo on interphase nano-precipitation in Ti-Mo micro-alloyed steels

被引：13
|
作者：
Wang, Y. Q. [1 ,2 ]
Clark, S. J. [2 ,3 ]
Cai, B. [4 ]
Venero, D. Alba [5 ]
Yan, K. [6 ]
Gorley, M. [1 ]
Surrey, E. [1 ]
McCartney, D. G. [2 ,7 ]
Sridhar, S. [8 ]
Lee, P. D. [2 ,3 ]
机构：
[1] United Kingdom Atom Energy Author, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
[2] Rutherford Appleton Lab, Res Complex Harwell, Harwell OX11 0FA, Oxon, England
[3] UCL, Dept Mech Engn, Torrington Pl, London WC1E 7JE, England
[4] Univ Birmingham, Sch Met & Mat, Birmingham, W Midlands, England
[5] STFC Rutherford Appleton Lab, ISIS, Didcot OX11 0QX, Oxon, England
[6] Univ Manchester, Sch Mat, Manchester M13 9PL, Lancs, England
[7] Univ Nottingham, Adv Mat Grp, Nottingham NG7 2RD, England
[8] Colorado Sch Mines, George S Ansell Dept Met & Mat Engn, Golden, CO 80401 USA
来源：
SCRIPTA MATERIALIA | 2020年 / 174卷
基金：
英国工程与自然科学研究理事会;
关键词：
Micro-alloyed steel; Interphase precipitation; Small-angle-scattering; NANOMETER-SIZED CARBIDES; ROLLED SHEET STEEL; HIGH-STRENGTH; TITANIUM; MOLYBDENUM; AUSTENITE; BEHAVIOR; FERRITE; NB;
D O I：
10.1016/j.scriptamat.2019.08.016
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Ti-containing micro-alloyed steels are often alloyed with molybdenum (Mo) to reduce nano-precipitate coarsening, although the mechanism is still disputed. Using small angle neutron scattering we characterised the precipitate composition and coarsening of Ti-alloyed and Ti-Mo-alloyed steels. The results demonstrate similar to 25 at.% of Ti is substituted by Mo in the (Ti, Mo)C precipitates, increasing both the precipitate volume percent and average size. Mo alloying did not retard precipitation coarsening, but improved lattice misfit between precipitate and matrix, contributing to better ageing resistance of the Ti-Mo-alloyed steel. This new understanding opens opportunities for designing ageing-resistant micro-alloyed steels with lean alloying elements. (C) 2019 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：24 / 28
页数：5
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