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Spark plasma sintering of aluminum powders prealloyed with scandium additions

机译：预掺scan铝粉的火花等离子烧结

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The objective of this research was to commence work on the spark plasma sintering (SPS) of Al-Sc alloys in an effort to develop fundamental data in this area. In this precursory study, a series of binary systems containing 0.1 to 0.4 wt% Sc were processed in laboratory and industrial-scale equipment. Data revealed that all powders were responsive to SPS in both scenarios and that sintering temperature was a variable of critical importance. Hardness of as-sintered products scaled directly with Sc concentration but varied inversely with SPS temperature owing to in-situ aging of the raw powders. Hardness losses could be recovered through a post-SPS heat treatment into the T6 condition. Industrially processed slugs of Al-0.4SC-T6 exhibited full densification and offered the highest hardness (786+/－8 MPa). This was accompanied by a nominal tensile yield strength of 197 MPa, UTS of 226 MPa and tensile ductility of 11%.
机译：这项研究的目的是开始研究Al-Sc合金的火花等离子体烧结（SPS），以期开发该领域的基础数据。在这项前期研究中，在实验室和工业规模的设备中处理了一系列含有0.1至0.4 wt％Sc的二元体系。数据显示，在两种情况下，所有粉末均对SPS敏感，并且烧结温度是至关重要的变量。烧结后产品的硬度与Sc浓度成正比，但由于原粉的原位老化，其硬度与SPS温度成反比。硬度损失可以通过SPS后热处理进入T6状态来恢复。工业加工的Al-0.4SC-T6块料具有完全的致密化，并具有最高的硬度（786 +/- 8 MPa）。这伴随着标称拉伸屈服强度为197 MPa，UTS为226 MPa和拉伸延展性为11％。

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