Fatigue life improvement by vibro-peening and shot peening

通过振动喷丸和喷丸提高疲劳寿命

• 批准号: 491417-2015
• 负责人: Lévesque, Martin
• 金额: $ 1.82万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=586897
• 关键词: Fatigue; life; improvement; vibro; peening

Vibratory finishing is a surface treatment in which components are inserted in an oscillating bowl containing polishing media. The media flow around the component polishes its surface and decreases its roughness. VibraFinish has recently developed a vibro-peening machine that induces important surface compressive residual stresses, similar to those induced by the conventional shot peening process, while delivering a mirror-like surface finish. The process is relatively new and high technology industries, like aerospace, require sound investigations of the underlying fundamental mechanisms involved in the process before considering investing in more extensive studies that would eventually lead to the process acceptance. The principal objective of this short project is to provide a preliminary scientific understanding of the vibro-peening effects on a selected material. This scientific endeavour will combine microstructural changes observations, residual stresses measurements, predictive models and fatigue testing for understanding, and eventually optimizing, the vibro-peening effects on fatigue life. VibraFinish is in an ideal position for innovating in the fatigue life improvement surface treatments industry. Its process is new and very few companies in the world can perform vibro-peening. Developing a deeper scientific understanding of its process could provide VibraFinish with means to improve and optimize it, as well as anticipating potential fatigue life improvement benefits. This work would provide VibraFinish with the required scientific knowledge to eventually convince aerospace companies to invest in larger collaborative projects to further understand and optimize the process effects. The preliminary scientific work proposed in this application, conducted by recognized experts in the field, could be the first step of a fruitful collaboration that would help to rise VibraFinish as a leading company on the vibro-peening treatment.

振动抛光是一种表面处理，其中部件插入振动碗中， 抛光介质。部件周围的介质流动会抛光其表面并降低其粗糙度。 VibraFinish最近开发了一种振动喷丸机， 残余应力，类似于由常规喷丸工艺引起的残余应力， 镜面光洁度。这一过程相对较新，高科技行业，如航空航天，需要 在考虑之前，对过程中涉及的基本机制进行合理的调查 投资于更广泛的研究，最终将导致该过程的接受。 这个短项目的主要目标是提供一个初步的科学认识， 振动喷丸对选定材料的影响。这项科学努力将联合收割机 观察、残余应力测量、预测模型和疲劳测试， 最终优化振动喷丸对疲劳寿命的影响。 VibraFinish在疲劳寿命改善表面处理行业处于创新的理想位置。 它的过程是新的，世界上很少有公司可以执行振动喷丸。发展更深层次的 科学地理解其工艺可以为VibraFinish提供改进和优化的方法， 以及预期潜在的疲劳寿命改善益处。这项工作将为VibraFinish提供 需要科学知识，最终说服航空航天公司投资于更大的合作项目， 项目，以进一步了解和优化工艺效果。本报告中提出的初步科学工作 由该领域公认的专家进行的应用程序可能是富有成效的合作的第一步， 将有助于VibraFinish成为振动喷丸处理领域的领先公司。