Effects of milling parameters on the microstructure and Charpy impact properties of MA/ODS ferritic steels
Effects of milling parameters on the microstructure and Charpy impact properties of MA/ODS ferritic steels
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DOI：
10.1016/j.fusengdes.2017.10.025
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发表时间：
2018
影响因子：
1.7
通讯作者：
N. Y. Iwata;R. Kasada;A. Kimura;T. Okuda
中科院分区：
文献类型：
--
作者：
N. Y. Iwata;R. Kasada;A. Kimura;T. Okuda
在磨耗器或行星球磨机中，在氩气气氛和热挤压条件下，采用机械合金化（MA）法制备ODS铁素体钢。在氩气中进行磨粉，控制过量氧（Ex.O）和氮气，可以有效降低MA粉末的粒度。随着氧、氮浓度的增加，添加Al的钢中形成了粗al2o3颗粒和细AlN析出物。降低ODS铁素体钢中Ex.O和氮的浓度是提高其冲击性能的关键参数。
ODS ferritic steels were produced by mechanical alloying (MA) in either attritor or planetary ball mills under argon atmosphere and hot extrusion. Milling in argon with controlling excess oxygen (Ex.O) and nitrogen was effective to reduce the particle size of MA powders. Coarse Al2O3particles and fine AlN precipitates were found to be formed in an Al added steel when the Ex.O and nitrogen concentrations are increased. Lowering the Ex.O and nitrogen concentrations in ODS ferritic steels acted as a key parameter for enhancing their impact properties.