Evaluation of a New High Pressure Diecast Magnesium Alloy with Improved Ductility for Self-Piercing Riveting (SPR) Performance

评估具有改进延展性的新型高压压铸镁合金的自冲铆接 (SPR) 性能

• 批准号: 532179-2018
• 负责人: Pekguleryuz, Mihriban
• 金额: $ 0.91万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Engage Plus Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=661836
• 关键词: Evaluation; New; Pressure; Diecast; Magnesium

Growing CO2 emissions from the transportation sector contribute 25% of Canada's greenhouse gas emissions**in which the government has targeted 45-65% reduction by 2050. A 10% saving in vehicle weight leads to ~8%**fuel economy and ~20 kg reduced CO2 emissions per kg of vehicle weight reduced. The automotive sector**contributes over 12% of Canada's manufacturing Gross Domestic Product (GDP) with more than 550,000 jobs.**Innovation in vehicle components is of strategic importance for this global & highly competitive industry.**Creating expertise and a technology-base in the magnesium (Mg) automotive parts industry is important for**Canada's global competition, to sustain the current level and to enable future technologies of electric, fuel cell,**and hybrid powered vehicles creating opportunities for new job creation, and environmental sustainability.**Meridian Lightweight Technologies (MLT) is the largest supplier of lightweight Mg die castings in the world,**serving most of the global automotive manufacturers on three continents. To develop a new Mg application,**the organization urgently needs a new Mg alloy which can be fastened by Self-Piercing Riveting (SPR)**technology. SPR exhibits significant challenges in Mg dissimilar metal joints when Mg is the lower layer.**MLT considering the main factors governing the SPR performance of Mg alloys to be tensile ductility in**2017-18, conducted an NSERC Engage with Prof. M. Pekguleryuz (McGill) and developed a new Mg alloy**with 14% higher ductility, better tensile strength & corrosion resistance than the commercial alloy AM50A.**These properties make the new Mg alloy highly interesting for developing new automotive applications. The**development of diecasting alloys is rather challenging. Since commercial diecasting machines are usually made**for casting large parts, early phases of Mg alloy development are customarily conducted on permanent mold**samples, as was in our initial Engage project. MLT uses diecasting to produce their automotive parts. Since the**casting processes have impact on the properties (strength, ductility, corrosion resistance) of Mg alloys, in the**proposed project, the new alloy will be optimized and developed for the diecasting process.

运输业不断增长的二氧化碳排放量占加拿大温室气体排放量的25%，政府的目标是到2050年减少45%-65%的温室气体排放量。车辆重量每减少10%，燃油经济性就会降低8%**，每减少一公斤车辆重量，二氧化碳排放量就会减少约20公斤。汽车行业**贡献了加拿大制造业国内生产总值(GDP)的12%以上，提供了超过550,000个工作岗位。**汽车零部件的创新对于这个全球竞争激烈的行业具有战略重要性。**在镁(MG)汽车零部件行业创造专业知识和技术基础对于**加拿大的全球竞争、维持当前水平以及使电动、燃料电池、**和混合动力汽车的未来技术创造新的就业机会和环境可持续性至关重要。**子午线轻量化技术(MLT)是世界上最大的轻型镁压铸供应商，**为三大洲的大多数全球汽车制造商提供服务。为了开发新的镁应用，**该组织迫切需要一种新的镁合金，可以通过自冲铆接(SPR)技术进行紧固**。当镁是底层时，镁在异种金属接头中表现出巨大的挑战。**MLT考虑到控制镁合金SPR性能的主要因素**2017-18年，与M.Pekgueryuz(McGill)教授进行了NSERC合作，开发了一种新的镁合金**，比商业合金AM50A延展性高14%，抗拉强度和耐腐蚀性更好。**这些特性使新的镁合金在开发新的汽车应用方面非常有兴趣。压铸合金的发展是相当具有挑战性的。由于商用压铸机通常**用于铸造大型零件，因此镁合金开发的早期阶段通常在永久性模具**样品上进行，就像我们最初的接洽项目一样。MLT使用压铸来生产他们的汽车零部件。由于**铸造工艺对镁合金的性能(强度、塑性、耐腐蚀性)有影响，在**拟议的项目中，将针对压铸工艺对新合金进行优化和开发。