A study on strengthening and machining integrated ultrasonic peening drilling of Ti-6Al-4V

In aircraft assembly filed, introducing compressive residual stress by cold expansion around the fastening hole is considered as a common method to enhance hole fatigue resistance. However, the conventional cold expansion technology inevitably extends the processing cycle of fastening hole. Therefor...

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Autores principales:	Yihang Liu, Daxi Geng, Zhenyu Shao, Zehua Zhou, Xinggang Jiang, Deyuan Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Ti-6Al-4V Ultrasonic peening drilling (UPD) Strengthening Surface integrity Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/5655aa66f17344d4ab5e306dc6a0f2f8
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id	oai:doaj.org-article:5655aa66f17344d4ab5e306dc6a0f2f8
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spelling	oai:doaj.org-article:5655aa66f17344d4ab5e306dc6a0f2f82021-11-14T04:28:34ZA study on strengthening and machining integrated ultrasonic peening drilling of Ti-6Al-4V0264-127510.1016/j.matdes.2021.110238https://doaj.org/article/5655aa66f17344d4ab5e306dc6a0f2f82021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0264127521007930https://doaj.org/toc/0264-1275In aircraft assembly filed, introducing compressive residual stress by cold expansion around the fastening hole is considered as a common method to enhance hole fatigue resistance. However, the conventional cold expansion technology inevitably extends the processing cycle of fastening hole. Therefore, this study proposes a strengthening and machining integrated ultrasonic peening drilling (UPD) to solve this problem by introducing ultrasonic vibration perpendicular to the hole surface during drilling. Both the strengthening principle and dimension accuracy improvement mechanism in UPD were analyzed to better understand the cutting mechanism. The feasibility experiments of UPD of Ti-6Al-4V were conducted to evaluate surface integrity and machining accuracy. The results show that compared to conventional drilling (CD), smoother machined surface and narrower dimensional tolerance were obtained with UPD. Moreover, the subsurface plastic deformation was increased by as high as 4 times with severer deformation degree. Accordingly, the surface residual stress and the depth of circumferential residual stress in the subsurface was increased by 115.7% and 125% respectively. In addition, surface micro-hardness and subsurface hardening layer depth were also significantly increased. The results demonstrated that UPD achieved the integration of strengthening and precision-machining and could be a promising method for finish drilling of aircraft fastening holes.Yihang LiuDaxi GengZhenyu ShaoZehua ZhouXinggang JiangDeyuan ZhangElsevierarticleTi-6Al-4VUltrasonic peening drilling (UPD)StrengtheningSurface integrityMaterials of engineering and construction. Mechanics of materialsTA401-492ENMaterials & Design, Vol 212, Iss , Pp 110238- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ti-6Al-4V Ultrasonic peening drilling (UPD) Strengthening Surface integrity Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Ti-6Al-4V Ultrasonic peening drilling (UPD) Strengthening Surface integrity Materials of engineering and construction. Mechanics of materials TA401-492 Yihang Liu Daxi Geng Zhenyu Shao Zehua Zhou Xinggang Jiang Deyuan Zhang A study on strengthening and machining integrated ultrasonic peening drilling of Ti-6Al-4V
description	In aircraft assembly filed, introducing compressive residual stress by cold expansion around the fastening hole is considered as a common method to enhance hole fatigue resistance. However, the conventional cold expansion technology inevitably extends the processing cycle of fastening hole. Therefore, this study proposes a strengthening and machining integrated ultrasonic peening drilling (UPD) to solve this problem by introducing ultrasonic vibration perpendicular to the hole surface during drilling. Both the strengthening principle and dimension accuracy improvement mechanism in UPD were analyzed to better understand the cutting mechanism. The feasibility experiments of UPD of Ti-6Al-4V were conducted to evaluate surface integrity and machining accuracy. The results show that compared to conventional drilling (CD), smoother machined surface and narrower dimensional tolerance were obtained with UPD. Moreover, the subsurface plastic deformation was increased by as high as 4 times with severer deformation degree. Accordingly, the surface residual stress and the depth of circumferential residual stress in the subsurface was increased by 115.7% and 125% respectively. In addition, surface micro-hardness and subsurface hardening layer depth were also significantly increased. The results demonstrated that UPD achieved the integration of strengthening and precision-machining and could be a promising method for finish drilling of aircraft fastening holes.
format	article
author	Yihang Liu Daxi Geng Zhenyu Shao Zehua Zhou Xinggang Jiang Deyuan Zhang
author_facet	Yihang Liu Daxi Geng Zhenyu Shao Zehua Zhou Xinggang Jiang Deyuan Zhang
author_sort	Yihang Liu
title	A study on strengthening and machining integrated ultrasonic peening drilling of Ti-6Al-4V
title_short	A study on strengthening and machining integrated ultrasonic peening drilling of Ti-6Al-4V
title_full	A study on strengthening and machining integrated ultrasonic peening drilling of Ti-6Al-4V
title_fullStr	A study on strengthening and machining integrated ultrasonic peening drilling of Ti-6Al-4V
title_full_unstemmed	A study on strengthening and machining integrated ultrasonic peening drilling of Ti-6Al-4V
title_sort	study on strengthening and machining integrated ultrasonic peening drilling of ti-6al-4v
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/5655aa66f17344d4ab5e306dc6a0f2f8
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A study on strengthening and machining integrated ultrasonic peening drilling of Ti-6Al-4V

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