New Generation of Castable Al Alloys Possessing High Strength and Elevated Electrical Conductivity

具有高强度和高导电性的新一代可浇注铝合金

• 批准号: RGPIN-2022-04295
• 负责人: Javidani, Mousa
• 金额: $ 1.89万
• 依托单位: Université du Québec à Chicoutimi
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=765109
• 关键词: New; Generation; Castable; Al; Alloys

The demand for high strength castable Al-based alloys possessing high conductivity is continuously increasing. One of the main applications of these Al alloys is on fabrication of electric vehicle (EV) components. These components are usually made through high pressure die-casting (HPDC) process, which requires high hot tearing resistance. Hence, in addition to high yield strength and improved electrical conductivity (EC), good castability is also required. However, developing such a new Al alloy is quite challenging, as the abovementioned requirements are contradicting factors. Therefore, a comprehensive and systematic research plan is required to develop high strength Al-based alloys exhibiting high EC with sufficient castability. Three principal short term objectives of the current research program are to: 1) Develop castable Al conductors strengthened by nanosized precipitates/dispersoids using a systematic integration of thermodynamic models and experimental data; 2) Investigate the influence of heat-treatment parameters on the formation of nanosized precipitates/dispersoids; 3) Develop high-strength castable aluminum matrix composites conductors reinforced by Al2O3 nanoparticles (nanop) and conduct pilot HPDC-manufacturing trials. Al-Ni-based alloys containing various Si, Mg, Fe, Ce and Zr contents will be considered. Thermodynamic modeling will be employed to simulate the impact of the alloying elements on solidification path, microstructure evolution, and hot tearing susceptibility. The castability, mechanical properties and EC of the promising alloys will be investigated by experimental trials. An innovative heat treatment process will be developed to promote the nanostructured precipitates/dispersoids. Advanced microstructure characterisation will be conducted to study the formation kinetics of the precipitates/dispersoids. A property model will be developed to identify the contribution of underlying strengthening factors on strength and EC. Furthermore, Al matrix composites conductors reinforced by Al2O3 nanoparticles (nanop) will also be explored. The Al melt will be synthesized by NiO particles, to promote Al2O3 nanop in Al matrix through an aluminothermy reaction. A pilot manufacturing HPDC trials will also be conducted to validate the developed products' processability and performance. The long-term objective of this ND program, aligned with the Al industry's priorities, is to establish an inclusive and diverse research group capable of answering the practical and fundamental challenges related to Al transformation. Over the next 5 years, achievement of these long-term research goals will provide the foundation for future projects. This program will also provide multidisciplinary training for 5 HQPs who will be competitive in the job market. The program will also encourage many fruitful national and international collaborations, and contribute to the evolution of science-based improvements in Al products and process development.

对具有高电导率的高强度铸造合金的需求不断增加。这些AL合金的主要应用之一是制造电动汽车（EV）组件。这些组件通常是通过高压压铸（HPDC）工艺制成的，这需要高热的撕裂性。因此，除了高屈服强度和提高电导率（EC）外，还需要良好的铸造性。但是，开发这种新的AL合金非常具有挑战性，因为上述要求是矛盾的因素。因此，需要一项全面的系统研究计划，以开发具有足够可铸性的高EC的高强度合金。当前研究计划的三个主要短期目标是：1）使用热力学模型和实验数据的系统集成，通过纳米化沉淀物/分散体加强可铸造的AL导体； 2）研究热处理参数对纳米沉淀/分散体形成的影响； 3）开发高强度可铸造的铝制基质复合材料导体由Al2O3纳米颗粒（Nanop）增强并进行Pilot HPDC制造试验。将考虑含有各种Si，Mg，Fe，Ce和Zr含量的基于Al-Ni的合金。热力学建模将用于模拟合金元素对凝固路径，微结构演化和热撕裂敏感性的影响。实验试验将研究有希望合金的可铸性，机械性能和EC。将开发创新的热处理过程，以促进纳米结构的沉淀/分散体。将进行高级微观结构表征，以研究沉淀/分散体的形成动力学。将开发财产模型来确定潜在强化因素对强度和EC的贡献。此外，还将探索Al2O3纳米颗粒（Nanop）增强的Al基质复合材料导体。 Al熔体将通过NiO颗粒合成，以通过铝疗反应促进Al基质中的Al2O3 Nanop。还将进行试点制造的HPDC试验，以验证开发产品的加工性和性能。该ND计划与AL行业的重点保持一致的长期目标是建立一个能够回答与AL转型相关的实际和基本挑战的包容性和多样化的研究小组。在接下来的5年中，这些长期研究目标的实现将为未来的项目奠定基础。该计划还将为5个HQP提供多学科培训，他们将在就业市场上具有竞争力。该计划还将鼓励许多富有成果的国家和国际合作，并为基于科学的产品和过程开发的基于科学改进的发展做出贡献。