CAREER: Towards High Strength Corrosion-Resistant Magnesium Alloys

事业：迈向高强度耐腐蚀镁合金

• 批准号: 1846887
• 负责人: Rajeev Gupta
• 金额: $ 50万
• 依托单位: University of Akron
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-06-15 至 2021-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1846887&HistoricalAwards=false
• 关键词: CAREER; Towards; Strength; Corrosion; Resistant

In order to meet current technological, socio-economic and environmental challenges, the need for lightweight, high strength and corrosion resistant alloys is increasing continuously. Magnesium, the third most abundant metal, is the lightest of all structural metals and therefore has attracted significant attention for a number of industries including aerospace, automotive, and infrastructure applications. Magnesium alloys also possess excellent biocompatibility and support bone growth, and thus these alloys are also considered candidate materials for biomedical applications. The use of magnesium alloys in these applications, however, is limited but their poor resistance to environmental degradation and low strength. The ability to mitigate the corrosion of magnesium alloys while simultaneously increasing the strength could revolutionize the automotive and aerospace industries, as well as the field of biomaterials. This Faculty Early Career Development Program (CAREER) award supports research to understand the fundamental mechanisms of both strength and corrosion resistance in magnesium alloys, with the goal of providing unprecedented control over the properties and making it possible to tailor these materials for specific technical applications. The work also incorporates far-reaching educational and outreach objectives to inspire students in grades K-12 to purse education in STEM disciplines; to recruit, retain and support outstanding and diverse student groups at undergraduate and graduate levels; and to provide students the opportunities for active learning, mentorship, and scholarship related to this research areas. The outreach programs include research opportunities to high school students, working with the high school teachers to stimulate interests in STEM fields among young students and broaden participation of underrepresented groups.This research will contribute to the fundamental understanding of the properties of metastable nanocrystalline magnesium (Mg) alloys and the mechanisms that can enable high strength and corrosion resistant Mg alloys. Inspired by the phenomenon causing the "stainless" behavior in stainless steels, an innovative approach of improving mechanical strength and corrosion resistance of Mg alloys will be undertaken. The specific objectives of this research are to: 1) produce Mg alloys with a wide range of grain size, dispersion of intermetallics, and solid solubility of the alloying element; 2) study the influence of the nanocrystalline structure, the solid solubility of the metal alloying elements, and intermetallics on corrosion and mechanical properties; 3) identify the key mechanisms causing simultaneous improvement in corrosion and mechanical properties of magnesium alloys, and develop a theoretical framework for designing high strength corrosion resistant magnesium alloys.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

为了应对当前的技术，社会经济和环境挑战，对轻质，高强度和耐腐蚀合金的需求正在不断增加。镁是所有结构金属中最轻的金属，因此引起了许多行业的关注，包括航空航天，汽车和基础设施应用。镁合金还具有出色的生物相容性和支持骨生长，因此这些合金也被认为是用于生物医学应用的候选材料。但是，在这些应用中使用镁合金是有限的，但是它们对环境降解和强度低的抵抗力较差。减轻镁合金腐蚀同时提高强度的能力可以改变汽车和航空航天工业以及生物材料领域。这项教师早期职业发展计划（职业）奖支持研究，以了解镁合金中强度和腐蚀性的基本机制，其目的是提供对物业前所未有的控制，并使这些材料为特定的技术应用量身定制。这项工作还纳入了深远的教育和外展目标，以激发K-12年级的学生在STEM学科中的教育；在本科和研究生级别招募，保留和支持杰出和多样化的学生团体；并为学生提供与该研究领域相关的积极学习，指导和奖学金的机会。外展计划包括向高中生的研究机会，与高中教师合作，以激发年轻学生中的STEM领域的兴趣，并扩大了人为人数不足的群体的参与。这项研究将有助于对亚固型纳米晶体稳定稳定镁（MG）合金的基本理解，并且可以使高强度和抗腐蚀性抗强度和抗腐蚀性。受到导致不锈钢行为“不锈钢行为”的现象的启发，将采取一种创新的方法，以提高MG合金的机械强度和耐腐蚀性。这项研究的具体目标是：1）生产具有较大晶粒尺寸的MG合金，金属间的分布以及合金元件的固体溶解度； 2）研究纳米晶体结构的影响，金属合金元件的固体溶解度以及金属间化对腐蚀和机械性能的影响； 3）确定引起镁合金腐蚀和机械性能的同时改善的关键机制，并开发了一个理论框架，用于设计耐高强度腐蚀的耐镁合金。这项奖项反映了NSF的法定任务，并通过使用基金会的知识优点和广泛的影响来评估NSF的法定任务。

项目成果

Enhanced corrosion resistance and surface bioactivity of AZ31B Mg alloy by high pressure cold sprayed monolayer Ti and bilayer Ta/Ti coatings in simulated body fluid

• DOI: 10.1016/j.matchemphys.2020.123627
• 发表时间: 2020-12-01
• 期刊: MATERIALS CHEMISTRY AND PHYSICS
• 影响因子: 4.6
• 作者: Daroonparvar, M.;Khan, M. U. Farooq;Bakhsheshi-Rad, H. R.
• 通讯作者: Bakhsheshi-Rad, H. R.

Improvement of Wear, Pitting Corrosion Resistance and Repassivation Ability of Mg-Based Alloys Using High Pressure Cold Sprayed (HPCS) Commercially Pure-Titanium Coatings

• DOI: 10.3390/coatings11010057
• 发表时间: 2021-01-01
• 期刊: COATINGS
• 影响因子: 3.4
• 作者: Daroonparvar, Mohammadreza;Kasar, Ashish K.;Gupta, Rajeev K.
• 通讯作者: Gupta, Rajeev K.

Corrosion Behavior and Hardness of Binary Mg Alloys Produced via High-Energy Ball-Milling and Subsequent Spark Plasma Sintering

通过高能球磨和随后的火花等离子烧结生产的二元镁合金的腐蚀行为和硬度

• DOI: 10.5006/3633
• 发表时间: 2020
• 期刊: Corrosion
• 影响因子: 1.6
• 作者: Farooq Khan, Mohammad Umar;Larimian, Taban;Borkar, T.;Gupta, R.K.
• 通讯作者: Gupta, R.K.