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Adiabatic shear banding behavior of additively manufactured superalloy IN 625

机译：625中加含量超合金的绝热剪切动作

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摘要

Additively manufactured nickel superalloy (IN 625) has gained popularity as an alternative to produce high value products of complex geometries for high strength applications under high temperature and corrosive environments. Many of these applications also demand the alloy to withstand high strain rate plastic deformation before the onset of catastrophic failure. The alloy's utility for high strain rate applications would be compromised if it were to fail suddenly by mechanisms such as adiabatic shear localization. This paper evaluates the shear localization behavior of an additively manufactured IN 625, and compares it to the behavior of the material of equal nominal composition, but prepared by traditional cast-wrought processing. The evaluation was made by imposing pure shear at strain rates of the order of 10,000 1/s in a simple machining configuration. It was found that the additive alloy experienced adiabatic shear banding more readily than the cast-wrought counterpart did. This finding contradicted predictions based on constitutive models developed for both alloys from split-Hopkinson compression testing, which indicated that the additive alloy strain hardened more than the cast-wrought counterpart did.
机译：加含量的镍超合金（625年）已经获得了普及，作为在高温和腐蚀性环境下生产高强度应用的复杂几何形状的高价值产物的替代方案。许多这些应用还要求合金在灾难性故障发生前承受高应变率塑性变形。如果通过诸如绝热剪切定位的机制突然失败，合金的高应变率应用的效用将受到损害。本文评估了625中含有加剧制造的剪切定位行为，并将其与等同标称组合物材料的行为进行比较，而是通过传统的铸造锻炼制备。通过以简单的加工配置将纯剪切施加纯剪切，以10,000 1 / s的级速率施加纯剪切来制备。发现添加剂合金经历了比铸造的对手更容易更容易的绝热剪切绷带。这发现基于来自分裂 - 霍普金森压缩检测的两种合金开发的本构模型的相对预测，这表明添加剂合金应变高于铸造的对手。

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