Development of an improved munition casing produced by Powder Metallurgy

在这一研究项目的范围内，加拿大通用动力公司希望与加拿大冶金工业集团quacimbec冶金中心合作，开发一种由粉末冶金生产的改进弹药外壳。关于弹药的“改进”一词可以用不同的限定来定义。在新型弹药的设计过程中，破片质量和速度分布的预测对优化弹药的杀伤效果和整体杀伤力具有重要意义。有些弹壳只产生少量碎片；然而，这些碎片有更大的危险周长，导致更高的附带伤害。为了安全起见，碎片的知识在进行风险管理中是必不可少的。将在项目中开发的改进包括增强碎片外壳设计和研究一种潜在的生产方法，称为DPR-S，直接粉末轧制-冲压。选择一种可以i)产生所需的机械性能，ii)工业化商业化和iii)减少材料浪费的巩固技术是至关重要的。虽然不同的制造方法可以实现第一个目标，但它们在扩展到可盈利的工业生产线时是有限的。直接粉末轧制法已实现商业化大规模生产，并已用于生产金属薄板。正在研究的过程的新颖之处在于它的混合性质，即DPR-S。“S”代表冲压成形。DPR-S组件的微结构对弹药组件的破片性能有重要影响。因此，将进行冶金表征以了解设计关键区域的套管状态。此信息将用于执行碎片性能评估并更好地理解碎片行为。该项目将分为四个阶段。-伪dprs设备的设置。-用伪dprs加工合金钢和用滚压冲压加工板材。-用伪dprs加固的外壳和卷印板的特性。-碎片性能评估。关于项目的影响，将获得的研究和知识将作为通用动力- ots Can持续改进计划的一部分应用。有可能实现一种可以商业化的新产品。对于CMQ， DPR-S方法将在未来的项目中开发和使用。

In the context of this research project in collaboration with the Centre de Metallurgy of Québec, CMQ, General Dynamics-OTS Canada wishes to develop an improved munition casing produced by Powder Metallurgy (PM). The term "improvement" regarding munitions can be defined by different qualifications. In the design process of new munitions, the prediction of the mass and velocity distributions of fragments plays a significant role to optimize the effects and the overall lethality of the munition. Some munition casings produce only a few fragments; however, these fragments have a larger hazardous perimeter resulting in higher collateral damage. For safety purposes, knowledge about fragmentation is essential in conducting risk management. The improvement that will be developed within the project consists of an enhanced fragmentation casing design and the study of a potential production method termed DPR-S, Direct Powder Rolling - Stamping.The selection of a consolidation technique that can i) yield the required mechanical properties, ii) be industrialized for commercialization and iii) reduce material waste is essential. Although different manufacturing methods can achieve the first, they are limited when it comes to scaling up to a profitable industrial production line. Direct Powder Rolling has already been commercialized for large scale production and has been used to produce metal sheets. The novelty of the process being studied is its hybrid nature, DPR-S. The "S" stands for the stamp forming. The microstructure of the DPR-S components plays a roll on the fragmentation behavior of the ammunition components. Therefore, metallurgical characterization will be performed to comprehend the casing state in key regions of the design. This information will be used to execute the fragmentation performance evaluation and better understand the fragmentation behavior. The project will be divided in four phases. - Set-up of pseudo-DPR-S equipment.- Processing of steel alloys by pseudo-DPR-S and sheets by roll-stamping.- Characterization of casings consolidated by pseudo-DPR-S and plates by roll-stamping.- Fragmentation performance evaluation.Regarding the impact of the project, the research and knowledge that will be gained will be applied as part of General Dynamics-OTS Can continued improvement initiative. Possibly achieving a new product that can be commercialized. For the CMQ, the DPR-S method will be developed and used in future projects.