Development of a Simplistic Method for Processing Intermetallic Sheet Materials Using Cold Roll Bonding and Reaction Annealing

开发一种利用冷轧结合和反应退火加工金属间板材的简单方法

• 批准号: 0606511
• 负责人: Viola Acoff
• 金额: $ 30万
• 依托单位: University of Alabama Tuscaloosa
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0606511&HistoricalAwards=false
• 关键词: Development; Simplistic; Method; Processing; Intermetallic

TECHNICAL: This program is a renewal of a previously funded program (DMR-0206826). The processing and fabrication of certain alloys and layered composites are inordinately expensive because of the sophisticated methodologies associated with existing processing techniques for these materials. The reactive metals including titanium are a prime example. They are difficult to process in the molten state because they react with crucible linings, as well as with oxygen and nitrogen in air, therefore vacuum systems and water-cooled crucibles must be used to produce titanium and titanium alloy ingots. Other materials that are difficult to process by conventional techniques are the intermetallic compounds. The research from the previous grant has provided vital information for cold roll bonding/reaction annealing as a simplistic processing technique for binary Ti/Al intermetallic sheet materials. Although a simple, less time consuming processing method, for intermetallic sheet materials has been developed, much more work is required to fully understand all of the parameters that affect the process. For example, texture has been known to develop in metals as a function of rolling. However, the previous study did not address the effects of texture on processing. In addition, an in-depth study of the effects of the development of ultra-fine grain structures as a result of severe deformation from multiple cold roll bonding is necessary. Also, preliminary work by the PI has shown that the technique developed in the previous grant for processing binary Ti/Al intermetallic materials has promise for successfully processing ternary intermetallic materials, primarily the Ti-Al-Nb system. The model developed in the previous grant only considered multi-layered bi-metal composites. Specific objectives of this program are: 1. Development and optimization of the cold roll bonding/reaction annealing process for making ternary Ti-Al-Nb sheet materials. 2. Determination of the effects of texture and ultra-fine grain structure on the microstructure and mechanical properties of the processed sheet. 3. Modify the existing model for cold roll bonding to accommodate three different types of elemental sheets. NON-TECHNICAL: As a class of materials, intermetallic compounds and alloys are of high technological interest because they are light in weight (low density) and maintain high strength levels at elevated temperatures (1100 C). Intermetallics have considerable potential in numerous aerospace, structural, and high temperature applications. However, the lack of breakthroughs in cost-effective processing techniques are partially responsible for the lack of their wide spread use in industry. Research will provide vital information for the further development of cold roll bonding/reaction annealing as a simplistic processing technique for advanced metals and materials. This technique can be scaled-up to create large sheets of Ti/Al/Nb intermetallics, as well as other intermetallics, which can be used to fabricate various items for marine, aerospace, structural and high temperature applications. By developing this simple, less time consuming processing method, production costs for these materials will be decreased significantly. The technique can potentially have a significant impact on alloy systems that are presently too difficult or too expensive to process using existing, or conventional techniques. It could lead to a significant increase in the practical applications and further development of intermetallic compounds in addition to numerous other alloy systems. The modeling component of the research should lead to predictive methods for roll bonging numerous combinations of several different types of thin metallic foils. The program will also lead to the teaching and training of graduate students and undergraduate students.

技术：该计划是对以前资助的计划（DMR-0206826）的续签。某些合金和分层复合材料的加工和制造非常昂贵，因为与这些材料的现有加工技术相关的复杂方法。包括钛在内的反应金属就是一个很好的例子。它们在熔融状态很难处理，因为它们与坩埚衬里以及空气中的氧气和氮反应，因此必须使用真空系统和水冷坩埚来生产钛和钛合金饲料。常规技术难以处理的其他材料是金属间化合物。以前的赠款的研究为冷卷键合/反应退火提供了至关重要的信息，作为一种简单的处理技术，用于二进制TI/AL金属间材料材料。尽管已经开发了一种简单，耗时的处理方法，但对于金属间材料的材料已经开发出来，但需要更多的工作才能充分了解影响该过程的所有参数。例如，已知质地是在金属中开发的，这是滚动的函数。但是，先前的研究并未解决纹理对处理的影响。此外，必须深入研究由于多个冷卷键合严重变形而导致超细晶粒结构发展的影响。此外，PI的初步工作表明，以前的处理二进制TI/AL金属间材料在先前的拨款中开发的技术有望成功处理三元金属间材料，主要是TI-AL-NB系统。上一份赠款中开发的模型仅考虑了多层双金属复合材料。该程序的具体目标是：1。制造三元ti-al-NB材料的冷卷键合/反应退火过程的开发和优化。 2。确定纹理和超细晶粒结构对加工纸的微结构和机械性能的影响。 3。修改现有模型以适应三种不同类型的元素片。非技术性：作为一类材料，金属间化合物和合金具有很高的技术兴趣，因为它们的重量轻（低密度）并在升高温度（1100 C）时保持高强度。在许多航空航天，结构和高温应用中，金属间具有很大的潜力。但是，缺乏具有成本效益的处理技术的突破，这是由于缺乏在行业中的广泛使用而部分原因。研究将提供至关重要的信息，以进一步开发冷卷键合/反应退火，作为一种简单的处理技术，用于晚期金属和材料。该技术可以扩大规模，以创建大型Ti/al/nb金属间代理以及其他金属层，可用于制造用于海洋，航空航天，结构和高温应用的各种物品。通过开发这种简单，耗时的处理方法，这些材料的生产成本将大大降低。该技术可能会对目前过于困难或太昂贵的合金系统产生重大影响，无法使用现有或常规技术处理。除了许多其他合金系统外，它可能导致实际应用的显着增加和金属间化合物的进一步发展。研究的建模组成部分应导致预测方法，用于滚动的多种类型的薄金属箔的组合。该计划还将导致研究生和本科生的教学和培训。