On the Time-Temperature-Transformation Behavior of a New Dual-Superlattice Nickel-Based Superalloy
On the Time-Temperature-Transformation Behavior of a New Dual-Superlattice Nickel-Based Superalloy
复制标题
DOI：
10.1007/s11661-017-4355-8
复制
发表时间：
2018-03
期刊：
影响因子：
--
通讯作者：
P. Mignanelli;N. Jones;M. Hardy;H. Stone
中科院分区：
文献类型：
--
作者：
P. Mignanelli;N. Jones;M. Hardy;H. Stone
最近的研究已经确定镍基高温合金的成分，其微观结构中含有可观且可比较体积分数的γ'和γ''沉淀物。在这项工作中，能够形成这种双超晶格微结构的合金经受了 873 K 至 1173 K（600 °C 和 900 °C）之间的热暴露，持续时间为 1 至 1000 小时。使用同步加速器 X 射线衍射和电子显微镜对沉淀相的微观结构和性质进行了表征。这些数据使得能够构建沉淀相的 T-T-T 图。每次热暴露后的硬度测量已经确定了该合金的时效硬化行为，并可以评估初步的机械性能。
Recent research has identified compositions of nickel-based superalloys with microstructures containing appreciable and comparable volume fractions ofγ′ andγ″ precipitates. In this work, an alloy capable of forming such a dual-superlattice microstructure was subjected to a range of thermal exposures between 873 K and 1173 K (600 °C and 900 °C) for durations of 1 to 1000 hours. The microstructures and nature of the precipitating phases were characterized using synchrotron X-ray diffraction and electron microscopy. These data have enabled the construction of a T-T-T diagram for the precipitating phases. Hardness measurements following each thermal exposure have identified the age-hardening behavior of this alloy and allowed preliminary mechanical properties to be assessed.