摘要
通过机械合金化(MA)和热等静压(HIP)技术制备14 YWT-ODS铁素体钢,将其分别在1100、1200和1300℃真空退火1 h并测试显微硬度,用原子探针层析技术(APT)对这些样品进行分析。结果表明,与HIP态样品相比,1100℃退火样品硬度略有降低,1200℃退火样品硬度下降明显,1300℃退火样品硬度显著下降;1100℃退火样品中Y-Ti-O纳米团簇大小未发生明显变化,高于1200℃退火时,样品中Y-Ti-O团簇粗化明显,数量密度显著降低。
Ferritic alloy Fe-14Cr-2W-0. 3Ti-0. 3Y2O3（ 14 YWT-ODS） was prepared by mechanical alloying（ MA） and hot isostatic pressing（ HIP）. The stability of the 14 YWT-ODS ferritic alloy after annealing at 1100,1200 and 1300 ℃ for 1 h was studied by microhardness test and atom probe tomography（ APT） analysis. The results show that the microhardness of the specimen decreases slightly after annealing at 1100 ℃,while decreases obviously at 1200 ℃ and significantly at 1300 ℃. The APT results reveal that there is little difference between the as-HIPed specimen and the annealed specimen at 1100 ℃ in the size and number density of the Y-Ti-O-enriched particles,while annealing above 1200 ℃ coarsens the Y-Ti-O-enriched nanoclusters obviously in size and decreases significantly in the number density,which indicates that high temperature mechanical properties of 14YWT-ODS ferritic alloy result from the stability of Y-TiO-enriched nanoclusters.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2015年第7期139-143,共5页
Transactions of Materials and Heat Treatment
基金
上海市科学技术委员会重点项目(12JC1404000)
