采用机械合金化和热等静压方法制备了ODS-316奥氏体钢(316L+0.35%Y2O3+0.3%Ti,质量分数).由于应变诱导发生相变,机械合金化后的粉末存在α(FeCr)和γ(Fe,Ni)两相.热等静压后的ODS钢基本为奥氏体单相,这是由于在致密化过程中消除了应变.通过对块体样品进行TEM观察和电子衍射谱标定,观察到3类弥散颗粒:立方晶系的Y2Ti2O7和TiN及正交晶系的Y2TiO5颗粒,其中富Y,Ti和O的弥散粒子分布较多.ODS-316奥氏体钢的抗拉强度达到726 MPa,较普通316不锈钢有显著提高.
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