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首页> 外文期刊>Materials Science and Engineering >Correlation of precipitate evolution with Vickers hardness in Haynes® 282® superalloy: In-situ high-energy SAXS/WAXS investigation
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Correlation of precipitate evolution with Vickers hardness in Haynes® 282® superalloy: In-situ high-energy SAXS/WAXS investigation

机译：Haynes®282®超级合金中析出物的析出与维氏硬度的关系：原位高能SAXS / WAXS研究

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摘要

The aim of this work is to characterize the precipitation kinetics in Haynes 282 superalloys using in-situ high-energy Small Angle X-ray Scattering (SAXS) together with Wide Angle X-ray Scattering (WAXS). The phases identified by WAXS include γ (matrix), γ' (hardening precipitates), MC (metallic carbides), and M_(23)C_6/M_6C (secondary metallic carbides). The γ'-precipitates are spheroids with a diameter of several nanometres, depending on the temperature and ageing time. From the SAXS data, quantitative parameters such as volume fraction, number density and inter-particle distance were determined and correlated with ex-situ Vickers mi-crohardness measurements. The strengthening components associated with precipitates and solid solutions are differentiated using the measured Vickers microhardness and SAXS model parameters. A square root dependence between strengthening attributable to the precipitates and the product of volume fraction and mean precipitate radius is found. The solid solution strengthening component correlates with the total volume fraction of precipitates.
机译：这项工作的目的是使用原位高能小角X射线散射（SAXS）和广角X射线散射（WAXS）来表征Haynes 282高温合金中的析出动力学。通过WAXS识别的相包括γ（基体），γ'（硬化沉淀），MC（金属碳化物）和M_（23）C_6 / M_6C（二次金属碳化物）。取决于温度和老化时间，γ'沉淀是直径为几纳米的球状。从SAXS数据中，确定了定量参数，例如体积分数，数量密度和粒子间距离，并将其与异位维克斯显微硬度测量相关联。使用测得的维氏显微硬度和SAXS模型参数来区分与沉淀物和固溶体相关的强化成分。发现了由沉淀引起的强化与体积分数与平均沉淀半径的乘积之间的平方根相关性。固溶强化成分与沉淀物的总体积分数相关。

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