Elevated temperature slow plastic deformation of NiAl-TiB2 particulate composites at 1200 and 1300K
Elevated temperature slow plastic deformation of NiAl-TiB2 particulate composites at 1200 and 1300K
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DOI：
10.1007/bf00544181
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发表时间：
1990
影响因子：
4.5
通讯作者：
J. Whittenberger;R. K. Viswanadham;S. Mannan;B. Sprissler
中科院分区：
文献类型：
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作者：
J. Whittenberger;R. K. Viswanadham;S. Mannan;B. Sprissler
在 1200 和 1300K 的空气中对 NiAl-TiB2 颗粒复合材料进行了高温压缩测试，应变率从~10−4 到~10−7sec−1 不等。这些材料由 B2 晶体结构金属间化合物 Ni-50at% Al 基体和 0 至 30 vol% 直径约 1 μm 的 TiB2 颗粒组成，通过 XD 合成并热压至全密度制备。复合材料的流动强度随着强化相的体积分数的增加而增加，其中NiAl-30TiB2的强度大约是NiAl的三倍。对比接收样品和测试样品的光学和透射电子显微结构，发现两相之间没有发生反应，NiAl-TiB2界面在变形过程中没有破裂。附加的透射电子显微镜表明，复合材料 NiAl 基体中颗粒稳定的微观结构与未增强 NiAl 中形成的微观结构截然不同。
Elevated temperature compression testing has been conducted in air at 1200 and 1300K with strain rates varying from ∼10−4to ∼10−7sec−1on NiAl-TiB2particulate composites. These materials, which consisted of a B2 crystal structure intermetallic Ni-50at% Al matrix and from 0 to 30 vol % of approximately 1 μm diameter TiB2particles, were fabricated by XD synthesis and hot pressed to full density. Flow strength of the composites increased with volume fraction of the strengthening phase with NiAl-30TiB2being approximately three times stronger than NiAl. Comparison of the light optical and transmission electron microstructures of asreceived and tested samples revealed that reactions did not occur between the two phases, and NiAl-TiB2interfaces were not cracked during deformation. Additional transmission electron microscopy indicated that the particles stabilize a vastly different microstructure in the NiAl matrix of the composites than that formed in unreinforced NiAl.