Influence of laser polishing on fatigue life of conventionally machined and laser powder bed fusion 316L stainless steel
Influence of laser polishing on fatigue life of conventionally machined and laser powder bed fusion 316L stainless steel
复制标题
激光抛光对常规加工和激光粉床熔合316L不锈钢疲劳寿命的影响
DOI：
10.1016/j.mfglet.2022.07.083
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发表时间：
2022
影响因子：
3.9
通讯作者：
Pfefferkorn, F.E.
中科院分区：
文献类型：
--
作者：
Faue, P.J.;Beste, L.-H.;Richter, B.;Agrawal, A.;Klingbeil, K.;Thoma, D.;Radel, T.;Pfefferkorn, F.E.
使增材制造的金属零件无法在工业中使用的主要因素之一是，与传统制造的零件相比，打印零件的疲劳寿命相对较低。此外，增材制造零件上的某些区域需要精加工操作才能使其发挥作用。虽然激光抛光已经证明了降低各种金属表面粗糙度的能力，包括添加剂制造的表面，但有必要研究该工艺的影响，以确保表面粗糙度的改善不会以损害疲劳寿命为代价。本工作的目的是确定激光抛光对传统和增材制造金属零件疲劳寿命的影响。对316L不锈钢进行常规加工和激光粉末床熔接增材制造制备疲劳试样。采用一组激光抛光参数来确定激光抛光对两种方法制备的样品的影响。这项工作表明，在一定的抛光条件下，可以在不牺牲疲劳寿命的情况下降低机械加工和增材制造零件的表面粗糙度。这表明激光抛光是解决增材制造表面粗糙度挑战的实用方法，同时不会对疲劳性能产生负面影响。©2022制造工程师协会。Elsevier Ltd.出版。版权所有。
One of the main factors keeping additive manufactured metal parts from being used in industry is the relatively low fatigue life of the as-printed parts when compared to their conventionally manufactured counterparts. In addition, certain areas on additively manufactured parts need finishing operations in order to make them functional. While laser polishing has demonstrated the ability to reduce the roughness of various metal surfaces, including additive manufactured ones, it is necessary to study the influence of this process to ensure the surface roughness improvements are not gained at the detriment of fatigue life. The objective of this work is to determine the influence of laser polishing on the fatigue life of both conventionally and additively manufactured metal parts. Fatigue samples were generated from 316L stainless steel using conventional machining and additive manufacturing through laser powder bed fusion. A single set of laser polishing parameters was used to determine the influence of laser polishing on samples manufactured from both methods. This work has shown that surface roughness of both machined and additive manufactured parts can be reduced without sacrificing fatigue life under certain polishing conditions. This demonstrates that laser polishing is a practical method for addressing additively manufactured surface roughness challenges while not negatively impacting fatigue performance.© 2022 Society of Manufacturing Engineers (SME). Published by Elsevier Ltd. All rights reserved.