High temperature oxidation protection in body-centered cubic superalloys

IF 5.3 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Alexander Kauffmann , Bronislava Gorr , Martin Heilmaier
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引用次数: 0

Abstract

Materials from the class of metallic-intermetallic, body-centered cubic (BCC) superalloys with microstructures composed of A2, B2 and L21 phases are candidates for high temperature application due to high solidus/solvus temperatures and the expectedly good creep resistance. However, experience with their base systems indicates substantial problems that need to be tackled when high temperature oxidation resistance is concerned. This is especially the case for refractory element-containing alloys where catastrophic oxidation at rather low temperatures can occur. This seems a particular challenge for alloy development as no predictive simulation capabilities and metallurgical mitigation strategies are available to systematically suppress critical oxidation behavior in complex alloys – while maintaining other relevant properties. The present article briefly reviews the possibilities to obtain known protective scales in relevant BCC superalloy systems. It concludes on the challenges that need to be addressed to empower novel BCC superalloys to provide protection against high temperature oxidation.
体心立方高温合金的高温氧化防护
由A2、B2和L21相组成的金属-金属间体心立方(BCC)高温合金材料由于具有较高的固溶温度和预期的良好抗蠕变性能,是高温应用的候选材料。然而,他们的基础系统的经验表明,当涉及到高温抗氧化性时,需要解决的实质性问题。这对于含有耐火元素的合金来说尤其如此,因为在相当低的温度下会发生灾难性的氧化。这似乎是合金开发的一个特殊挑战,因为没有预测模拟能力和冶金缓解策略可以系统地抑制复杂合金的临界氧化行为,同时保持其他相关性能。本文简要回顾了在相关BCC高温合金体系中获得已知保护尺度的可能性。最后总结了需要解决的挑战,以使新型BCC高温合金能够提供抗高温氧化的保护。
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来源期刊
Scripta Materialia
Scripta Materialia 工程技术-材料科学:综合
CiteScore
11.40
自引率
5.00%
发文量
581
审稿时长
34 days
期刊介绍: Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.
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