摘要
通过SEM、TEM和多功能内耗仪研究了F40级船板钢应变时效后的微观组织变化以及时效过程中的内耗行为.结果表明:应变时效过程中,F40级船板钢宏观组织没有发生明显的变化,组织很稳定;在内耗-温度曲线上230℃时出现一个内耗峰,这是由于游离态的碳原子在此条件下钉扎位错和摆脱位错钉扎所导致;位错组态的变化及位错与碳原子相互作用的宏观效应表现为钢板应变时效后硬度上升,韧性下降,韧脆转变温度升高.
The effects of strain aging on the microstructure evolution and internal friction of F40 hull structure steel were studied by SEM, TEM and multi-functional internal friction apparatus. The result showed that there was no obvious change in microstructure during the process of strain aging, displaying better mierostructure stability. A peak was found in the curve of internal friction to temperature, which can be attributed to C trapping on dislocations and dislocation motion. The strain aging phenomenon induced an increase in hardness associated with ductility loss and large toughness reduction. This trend is attributed to dislocation configurations and the interaction between interstitial carbon and dislocations.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2008年第11期1244-1248,共5页
Journal of University of Science and Technology Beijing
关键词
船板钢
应变时效
微观组织
内耗行为
hull structure steel
strain aging
microstructure
internal friction
