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首页> 外文期刊>High temperature materials and processes >Effects of Hot Isostatic Pressing (HIP) on Microstructure and Mechanical Properties of K403 Nickel-Based Superalloy
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Effects of Hot Isostatic Pressing (HIP) on Microstructure and Mechanical Properties of K403 Nickel-Based Superalloy

机译：等静压（HIP）对K403镍基高温合金组织和力学性能的影响

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摘要

The microstructure of as-cast and as-HIPed (hot isostatic pressed) K403 superalloy was investigated using a scanning electron microscopy (SEM), as component analysis was conducted by energy dispersive x-ray spectrometer (EDS). It was found that the microstructure of the alloy was improved significantly through HIP. Firstly, the microporosity and micropores in as-cast alloy were ameliorated effectively and the morphology of grains tended to be uniform. Moreover, the morphology of carbides at grain boundaries transformed from thread-like to granular. Uppermost, the size, shape and volume fraction of γ ′ phase were significantly optimized and γ ′ precipitates in two different sizes were generated in matrix. Nanoindentation experiment was then carried out to obtain the nanohardness and elastic modulus of as-cast and as-HIPed K403 superalloy. The results revealed an obvious increase in both nanohardness and elastic modulus after HIP. Conclusions could be drawn from the research that HIP could improve the microstructure of as-cast K403 superalloy, which could enhance the mechanical properties of the alloy positively.
机译：当使用能量色散X射线光谱仪（EDS）进行成分分析时，使用扫描电子显微镜（SEM）研究了铸态和HIP铸态（热等静压）K403高温合金的微观结构。发现通过HIP显着改善了合金的微观结构。首先，有效地改善了铸态合金中的微孔和微孔，晶粒的形态趋于均匀。此外，晶界处碳化物的形态从线状转变为粒状。最上方的γ'相的大小，形状和体积分数得到了显着优化，并且在基质中产生了两种不同大小的γ'沉淀。然后进行纳米压痕实验，以得到铸态和HIPed K403高温合金的纳米硬度和弹性模量。结果表明，HIP后纳米硬度和弹性模量均明显增加。从研究中可以得出结论，HIP可以改善铸态K403高温合金的显微组织，从而可以积极地提高合金的机械性能。

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