High Temperature Creep Properties of Ordered Nickel-Aluminum Alloys

有序镍铝合金的高温蠕变性能

• 批准号: 8700583
• 负责人: Amiya Mukherjee
• 金额: $ 33.5万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-15 至 1990-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8700583&HistoricalAwards=false
• 关键词: Temperature; Creep; Properties; Ordered; Nickel

This research program addresses the high temperature deformation of boron-doped nickel aluminide. Fundamental mechanisms responsible for high temperature creep and superplastic deformation will be studied. The unusual temperature dependence of the yield strength of this material, i.e., an increasing yield strength with increasing temperature up to a maximum, makes it a particularly interesting material for high temperature applications. Mechanisms causing creep and superplastic behavior are not well understood. The nature of the ordered lattice, including anisotropy of antiphase boundary energy and details of the cross- slip process, make the creep properties quite different from those observed in solid solution alloys. This project will investigate the rate-controlling micromechanisms of elevated temperature deformation in this ordered alloy.

该研究计划致力于解决掺硼铝化镍的高温变形问题。 将研究造成高温蠕变和超塑性变形的基本机制。 这种材料的屈服强度具有不寻常的温度依赖性，即屈服强度随着温度升高到最大值而增加，使其成为高温应用中特别有趣的材料。 引起蠕变和超塑性行为的机制尚不清楚。 有序晶格的性质，包括反相边界能量的各向异性和交叉滑移过程的细节，使得蠕变特性与在固溶体合金中观察到的蠕变特性有很大不同。 该项目将研究这种有序合金高温变形的速率控制微观机制。