Structure and mechanical properties of Fe–Ni–Zr oxide-dispersion-strengthened (ODS) alloys
Structure and mechanical properties of Fe–Ni–Zr oxide-dispersion-strengthened (ODS) alloys
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DOI：
10.1016/j.jnucmat.2015.09.011
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发表时间：
2015-12
影响因子：
3.1
通讯作者：
K. Darling;M. Kapoor;H. Kotan;B. Hornbuckle;S. Walck;G. Thompson;M. Tschopp;L. Kecskes
中科院分区：
文献类型：
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作者：
K. Darling;M. Kapoor;H. Kotan;B. Hornbuckle;S. Walck;G. Thompson;M. Tschopp;L. Kecskes
采用高能机械合金化法合成了一系列块体纳米结构Fe-Ni-Zr氧化物弥散强化（ODS）合金，并采用高温等通道角挤压法进行了强化。所得的微观结构由纳米/超细或微米尺寸的晶粒与较大的金属间沉淀物和小的Zr氧化物簇（直径<10 nm，通过原子探针断层扫描测量和确认）组成。ODS合金具有提高的压缩性能，例如，1.2在700 °C和1000 °C下固结的样品在室温下的压缩屈服应力分别为2.4GPa和2.4GPa。这项工作突出了这类铁素体ODS合金的加工，显微组织和性能之间的关系。
A series of bulk nanostructured Fe–Ni–Zr oxide-dispersion-strengthened (ODS) alloys were synthesized using high energy mechanical alloying and consolidated using high temperature equal channel angular extrusion. The resultant microstructures are composed of nano/ultrafine or micrometer-sized grains with larger intermetallic precipitates and small Zr oxide clusters (<10 nm diameter, measured and confirmed by atom probe tomography). The ODS alloys possess elevated compression properties, e.g., 1.2 and 2.4 GPa compressive yield stress at room temperature for samples consolidated at 700 °C and 1000 °C, respectively. This work highlights the relationship between processing, microstructure, and properties for this class of ferritic ODS alloys.