Characterization and modeling in light alloys and nano-bainitic steels

轻合金和纳米贝氏体钢的表征和建模

• 批准号: 23234-2013
• 负责人: Bhole, Sanjiwan
• 金额: $ 1.6万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=592988
• 关键词: Characterization; modeling; light; alloys; nano

Ever-increasing and stringent demands on advanced materials and processing technology in the automotive, aerospace, rail and defense industries pose enormous scientific and technological challenges. The newer advanced high strength steel alloys with vastly improved microstructures such as nano-bainitic steels have the potential to extend the use of steel to even more demanding applications in transportation, energy and defense sectors. Welding is the primary joining process in many of these applications and recent efforts have been directed in applying non-fusion welding techniques such as ultrasonic welding to the newer lightweight structural materials such as magnesium alloys in automotive and aerospace applications. The overall goal and long-term objective of this research program is to continue to make significant advances in the area of structure-property-transformation relationships with particular emphasis on the innovative solid-state welding processes and new promising nano-bainitic steels. Specifically, in this proposal the following will be studied: (i) process optimization of ultrasonic spot welding of dissimilar materials with special attention to the underlying mechanisms involving interface layer bonding, structure characteristics and properties, and (ii) development of new compositions and cost-effective heat treatment procedures for the nano-bainitic steels with superior combinations of strength with fracture resistance. Both experimental and modeling approaches will be adopted to make advances in these areas to further scientific understanding and to meet the demands of industry both through advanced research and through the training of HQP who are in high demand in industry and academia.

汽车、航空航天、铁路和国防工业对先进材料和加工技术日益增长的严格要求带来了巨大的科学和技术挑战。新型先进高强度钢合金具有显着改善的微观结构，例如纳米贝氏体钢，有可能将钢的用途扩展到交通、能源和国防领域要求更高的应用。焊接是许多此类应用中的主要连接工艺，最近的努力方向是将超声波焊接等非熔焊技术应用于汽车和航空航天应用中的镁合金等新型轻质结构材料。该研究计划的总体目标和长期目标是继续在结构-性能-转变关系领域取得重大进展，特别强调创新的固态焊接工艺和新的有前途的纳米贝氏体钢。具体来说，在该提案中将研究以下内容：（i）异种材料超声波点焊的工艺优化，特别关注涉及界面层结合、结构特征和性能的潜在机制，以及（ii）开发新成分和具有成本效益的纳米贝氏体钢热处理工艺，具有优异的强度和抗断裂性能。将采用实验和建模方法，通过先进的研究和对工业界和学术界急需的高级人才的培训，在这些领域取得进展，以进一步加深科学理解并满足工业界的需求。