Secondary recrystallisation of two oxide dispersion strengthened ferritic superalloys: MA 956 and MA 957
Secondary recrystallisation of two oxide dispersion strengthened ferritic superalloys: MA 956 and MA 957
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DOI：
10.1179/mst.1994.10.2.102
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发表时间：
1994-02
影响因子：
1.8
通讯作者：
M. Miodownik;J. Martin;E. Little
中科院分区：
文献类型：
--
作者：
M. Miodownik;J. Martin;E. Little
比较了MA 956和MA 957棒材的等温再结晶和区带再结晶反应。等温再结晶在MA 957中产生等轴毫米级晶粒，而MA 956具有高纵横比的晶粒。这归因于MA 956中氧化物颗粒的各向异性分布。在两种合金中，初始的强的1100 °纤维织构转变为位于10001 °-1111 °带轴上的织构。在所研究的条件范围内，MA 956中不能形成离散区再结晶界面。这可以通过各向异性边界钉扎力来解释。这导致MA 956中的横向速度较小，并且与MA 957中的区域再结晶织构不同。MST/1860
The response to isothermal recrystallisation and zone recrystallisation of rods of MA 956 and MA 957 has been compared. Isothermal recrystallisation produced equiaxed millimetre sized grains in MA 957, whereas MA 956 had grains of high aspect ratio. This is attributed to an anisotropic distribution of oxide particles in MA 956. In both alloys the initial strong 〈110〉 fibre texture is transformed into textures lying on the 〈001〉–〈111〉 zone axis. A discrete zone recrystallisation interface could not be formed in MA 956 under the range of conditions investigated. This may be accounted for by an anisotropic boundary pinning force. This results in small transverse velocities and also a different zone recrystallisation texture in MA 956 from that in MA 957. MST/1860