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【转载】增材制造镍基合金718微观组织研究 Characterisation and Metallurgy
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https://www.youtube.com/watch?v=hb_fgegYsis&t=1771s Additive Manufacturing (AM) is a rapidly growing technology allowing for near net shape components to be created. This has a lot of potential in the fabrication of bespoke components and performance of repairs. AM technology has traditionally been process-led, with huge strides taken in improving the integrity, repeatability and speed of deposition. However, the performance of components is dependent on their microstructures, which in turn relies on their thermo-mechanical history. A greater knowledge and control of the microstructure, and its effects on properties, is therefore vital to allow for further uptake across industries. The presentation gives an overview of key characterisation techniques employed to investigate the microstructure of AM components. Case studies are utilised to show this in action, with a specific focus on work performed on Alloy 718, an important material of interest across several industrial sectors, including aerospace and oil and gas. Further, the effect of heat treatment on AM material, compared with conventional wrought material, is discussed. For further details, please contact joe.grimwood@twi.co.uk 增材制造（AM）是一种快速发展的技术，允许制造接近净形状的部件。这在定制部件的制造和维修性能方面具有很大潜力。AM技术传统上以工艺为主导，在提高沉积的完整性、重复性和速度方面取得了巨大进步。然而，部件的性能取决于其微观结构，而微观结构又取决于其热机械历史。因此，对微观结构及其对财产的影响有更深入的了解和控制，对于促进各行业的进一步发展至关重要。 本文概述了用于研究AM部件微观结构的关键表征技术。通过案例研究表明了这一点，特别关注在718合金上进行的工作，718合金是几个工业部门（包括航空航天和石油天然气）都感兴趣的重要材料。此外，还讨论了与常规锻造材料相比，热处理对AM材料的影响。
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