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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Effect of oxide dispersoids addition on mechanical properties of tungsten heavy alloy fabricated by mechanical alloying process
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Effect of oxide dispersoids addition on mechanical properties of tungsten heavy alloy fabricated by mechanical alloying process

机译：氧化物弥散体的添加对机械合金化钨重合金力学性能的影响

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摘要

The microstructures and mechanical properties of mechanically alloyed oxide dispersion strengthened tungsten heavy alloys were investigated. Elemental powders of tungsten (W), nickel (Ni), iron (Fe) and partially stabilized zirconia (PSZ) were mechanically alloyed by a planetary mill. Mechanically alloyed powders were consolidated by liquid phase sintering at temperature ranged 1465-1485℃ for 1 h in hydrogen atmosphere to obtain full densification. The W grain size decreases with increasing PSZ content. The oxide dispersoids were dispersed both within W grains and W/W and W/matrix interfaces. The yield strength of oxide dispersion strengthened tungsten heavy alloy was not dependent on PSZ content but dependent on microstructural factor, while the elongation decreases with increasing PSZ content. However, the high temperature yield strength increases with increasing content of PSZ dispersoid and the PSZ dispersoids act as the strengthening agent at high temperature deformation.
机译：研究了机械合金化氧化物弥散强化钨重合金的组织和力学性能。钨（W），镍（Ni），铁（Fe）和部分稳定的氧化锆（PSZ）的元素粉末通过行星磨机进行机械合金化。机械合金化的粉末通过在1465-1485℃的氢气氛下液相烧结1 h进行固结，以获得完全的致密化。随着PSZ含量的增加，W晶粒尺寸减小。氧化物弥散体既分散在W晶粒内，又分散在W / W和W /基体界面中。氧化物弥散强化钨重合金的屈服强度与PSZ含量无关，而与显微组织因子有关，而伸长率随PSZ含量的增加而降低。然而，高温屈服强度随着PSZ分散质含量的增加而增加，并且PSZ分散质在高温变形时充当增强剂。

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