Precipitate hardening and aging in Ni-rich Ni-Re alloys

富镍镍铼合金中的沉淀硬化和时效

• 批准号: 84702733
• 负责人: Professor Dr. Stefan Müller (†)
• 金额: --
• 依托单位: Institut für Keramische Hochleistungswerkstoffe
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/84702733?language=en
• 关键词: Precipitate; hardening; aging; Ni; rich

The successful determination of the ground-state properties in Ni-rich Ni-W and Ni-Re alloys (first period) via ab-initio methods and cluster expansion has lead to some surprising structural results: We predict the existence of a possible precipitate phase in Ni-Re. Recently, there are some hints from experimental studies that such a phase may exist, indeed. Within one year, we plan to describe the precipitation and aging of this unknown phase in collaboration with the groups of Prof. Reed (Oxford, UK) and Dr. Motura (Birmingham, UK), so that a quantitative comparison with experimental data becomes possible. The existence of a precipitate phase in Ni-Re would be of tremendous importance for our understanding of the so-called Re-effect, i.e. the hardening of technologically relevant Ni-based superalloys by adding Re to the materials.

用从头算方法和团簇展开方法成功地测定了富Ni的Ni-W和Ni-Re合金(第一阶段)的基态性质，得到了一些令人惊讶的结构结果：我们预测在Ni-Re中可能存在一个析出相。最近，一些实验研究暗示，确实可能存在这样的阶段。在一年内，我们计划与Reed教授(牛津，英国)和Motura博士(英国伯明翰)合作描述这一未知阶段的沉淀和老化，以便与实验数据进行定量比较。Ni-Re中析出相的存在对于我们理解所谓的Re效应，即通过在材料中添加Re来强化技术上相关的镍基高温合金具有非常重要的意义。