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Effect of cyclic heat treatment and swaging on mechanical properties of the tungsten heavy alloys

机译：循环热处理和锻造对钨重合金力学性能的影响

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摘要

A tungsten heavy alloy containing cobalt and molybdenum was subjected to thermo-mechanical processing that employed cyclic heat treatments in order to explore the possibility of enhancing mechanical properties. The alloy was synthesized by liquid phase sintering followed by heat treatments which consisted single as well as multiple cycles. Subsequently, these were subjected to warm swaging imparting about 30% deformation. Discernible changes were observed in the microstructure following cyclic heat treatment in both heat treatment and swaged conditions. While there was marginal increase in tensile properties, impact toughness showed significant enhancement. A detailed analysis of micro-structure and fractographs was undertaken in order to understand the reasons for the enhancement in impact toughness and also the implication of these results in the development of heavy alloys with improved properties.
机译：为了研究提高机械性能的可能性，对含有钴和钼的钨重合金进行了热机械处理，该热机械处理采用了循环热处理。该合金是通过液相烧结，随后的热处理（包括一个或多个循环）合成的。随后，将它们进行热模锻，使其变形约30％。在热处理和模锻条件下，循环热处理后的微观结构均观察到明显变化。尽管拉伸性能略有提高，但冲击韧性却显示出明显的提高。为了了解导致冲击韧性提高的原因，并对这些结果在开发性能改进的重合金中的含义进行了详细的微观结构和分形仪分析。

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