Mechanical properties of thin wall specimens produced by additive manufacturing methods

增材制造方法生产的薄壁试样的机械性能

• 批准号: 576495-2022
• 负责人: Yue, StephenS
• 金额: $ 2.91万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 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=761077
• 关键词: Mechanical; properties; thin; wall; specimens

Additive manufacturing (AM) technology opens new opportunities for the economy and society of Canada. It can facilitate the production of strong, light-weight products for many sectors, including aerospace and biomedical, and it allows designs that were not possible with previous manufacturing techniques. Aluminum and titanium alloys are of great interest for AM since these are relatively expensive metals and AM can minimize the waste of material that is generated by traditional casting, forging and machining routes. Regarding the specific problem of thin walls, as section size decreases, surface sensitivity, i.e., surface finish, is much more influential on the properties In addition, due to the small feature dimensions, the thin walls are subjected to more significant thermal dissipation from the surrounding powder beds. As a result, thin features generated by AM processes often include defects such as un-melted powder inclusions, internal voids, cracks, and shape irregularities. Surface post-AM-processing techniques tackle the issues associated with the irregular morphology and the randomly positioned features on the surface of as-built AM material, by removing and/or smoothing the surface, or inducing a desired surface morphology or reducing the tensile surface residual stress. The goal of this partnership is therefore to understand the effect of powder characteristics and AM process variables and post AM build treatments on the additive manufacturing (AM) of components with thin wall dimensions, the ultimate goal being to be able to design powders with the most desirable characteristics for such AM builds made by laser- powder bed fusion (L-PBF) and binder jet processes. Since this project will be performed by 2 Ph.D. students, another major outcome will be to increase the AM technological base in Quebec and Canada. The project is a collaboration between McGill University, A P and C, a powder manufacturing company, and Nanogrande, a Canadian based manufacturer of high-resolution 3D printers, metal 3D parts and the first with nano additive manufacturing technology with metal powders. All three already enjoy strong collaborations and this project will readily build on this foundation.

增材制造（AM）技术为加拿大经济和社会开辟了新的机会。它可以促进许多领域（包括航空航天和生物医学）的强大，轻巧的产品的生产，并且允许使用以前的制造技术不可能进行设计。 铝合金和钛合金对AM引起了极大的兴趣，因为它们是相对昂贵的金属，并且AM可以最大程度地减少传统铸造，锻造和加工路线产生的材料的浪费。 关于薄壁的特定问题，随着截面的尺寸降低，表面敏感性（即表面饰面）对性质的影响更大，由于较小的特征尺寸，薄壁会受到周围粉末床的更重要的热耗散。结果，AM过程产生的薄特征通常包括缺陷，例如未融合的粉末夹杂物，内部空隙，裂纹和形状不规则。 地表后处理后技术通过去除和/或平滑表面或诱导所需的表面形态或减少拉伸表面残留应力来解决与不规则形态以及随机定位的特征相关的问题。 因此，这种伙伴关系的目的是了解粉末特性和AM过程变量的效果，并在AM构建处理上对具有薄壁尺寸的组件的添加剂制造（AM）的构建处理，最终目标是能够设计具有Laser-Powder-Powder-Powder-Powder-Powder-Power-fusefusion（L-PBF）和粉状喷气机的粉末特征最令人期望的粉末。由于该项目将由2 Ph.D.执行。学生，另一个主要结果是提高魁北克和加拿大的AM技术基础。 该项目是麦吉尔大学（McGill University），P and C（一家粉末制造公司）与加拿大高分辨率3D打印机，金属3D零件的加拿大制造商Nanogrande之间的合作。 这三个已经享有强有力的合作，该项目将很容易建立在这个基础上。