Development mechanical and fatigue properties of AA7001 after combined SP with deep cryogenic treatment and UIP with deep cryogenic treatment

Al alloys have long been of interest to the aerospace community, due to their modest specific strength, ease of manufacture, and low cost. In recent years, with the rapid development of weaponry, 7XXX ultra-high strength aluminum alloys used increasingly in military ﬁelds. Chemical analysis of the A...

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Autores principales:	Aseel A. Alhamdany, Ali Yousuf Khenyab, Qusay K. Mohammed, Hussain Jasim M. Alalkawi
Formato:	article
Lenguaje:	EN RU UK
Publicado:	PC Technology Center 2021
Materias:	aa7001 deep cryogenic treatment ultrasonic impact shot peening tensile and fatigue properties Technology (General) T1-995 Industry HD2321-4730.9
Acceso en línea:	https://doaj.org/article/152067a7b3fb4bf4a4cbd729f053e7c5
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spelling	oai:doaj.org-article:152067a7b3fb4bf4a4cbd729f053e7c52021-11-04T14:05:19ZDevelopment mechanical and fatigue properties of AA7001 after combined SP with deep cryogenic treatment and UIP with deep cryogenic treatment1729-37741729-406110.15587/1729-4061.2021.243391https://doaj.org/article/152067a7b3fb4bf4a4cbd729f053e7c52021-10-01T00:00:00Zhttp://journals.uran.ua/eejet/article/view/243391https://doaj.org/toc/1729-3774https://doaj.org/toc/1729-4061Al alloys have long been of interest to the aerospace community, due to their modest specific strength, ease of manufacture, and low cost. In recent years, with the rapid development of weaponry, 7XXX ultra-high strength aluminum alloys used increasingly in military ﬁelds. Chemical analysis of the AA 7001 is supported out at The Company State for Engineering, Rehabilitation and Inspection (SIER) in Iraq. Strengthening the surface (shot penning) is beneficial to delay crack nucleation and extend life. The test samples (tensile and fatigue) are subject to the SP process by using ball steel with the parameters (Pressure=12 bars, Speed=40 mm/min, Distance=150 mm, Shot size=2.25 mm, Coverage=100 %). The ultrasonic impact treatment (UIP) machine is used for enhancing the surface properties. For the Deep Cryogenic Treatment (DCT), the samples have been placed in the cooling chamber. A standard tensile test specimen is prepared in a round section with the dimensions chosen according to ASTM (A370-11). Tensile and fatigue of rotating bending with R=–1 have been conducting, after the effect of deep cryogenic treatment (DCT), combined shot peening (SP+DCT), and ultrasonic impact peening (UIP+DCT) of AA7001 have been examining. The maximum improvement percent in ultimate tensile strength (UTS) due to (DCT), (SP+DCT), and (UIP+DCT) were about 3 %, 8.27 %, and 6.25 %, respectively. The rise in the yield stress due to (DCT), (SP+DCT), and (UIP+DCT) were 9.5 %, 14.6 %, and 13.14 %, respectively. The ductility reduced by constituents of 8.57 %, 12.5 %, and 11.42 % sequentially. The improvement in fatigue strength in a high cycle regime is 16 % for (SP+DCT) due to combined effects, it is an 8 % increase in the endurance limit on fatigue behavior due to inducing compressive residual stress (CRS)Aseel A. AlhamdanyAli Yousuf KhenyabQusay K. MohammedHussain Jasim M. AlalkawiPC Technology Centerarticleaa7001deep cryogenic treatmentultrasonic impactshot peeningtensile and fatigue propertiesTechnology (General)T1-995IndustryHD2321-4730.9ENRUUKEastern-European Journal of Enterprise Technologies, Vol 5, Iss 1(113), Pp 62-69 (2021)
institution	DOAJ
collection	DOAJ
language	EN RU UK
topic	aa7001 deep cryogenic treatment ultrasonic impact shot peening tensile and fatigue properties Technology (General) T1-995 Industry HD2321-4730.9
spellingShingle	aa7001 deep cryogenic treatment ultrasonic impact shot peening tensile and fatigue properties Technology (General) T1-995 Industry HD2321-4730.9 Aseel A. Alhamdany Ali Yousuf Khenyab Qusay K. Mohammed Hussain Jasim M. Alalkawi Development mechanical and fatigue properties of AA7001 after combined SP with deep cryogenic treatment and UIP with deep cryogenic treatment
description	Al alloys have long been of interest to the aerospace community, due to their modest specific strength, ease of manufacture, and low cost. In recent years, with the rapid development of weaponry, 7XXX ultra-high strength aluminum alloys used increasingly in military ﬁelds. Chemical analysis of the AA 7001 is supported out at The Company State for Engineering, Rehabilitation and Inspection (SIER) in Iraq. Strengthening the surface (shot penning) is beneficial to delay crack nucleation and extend life. The test samples (tensile and fatigue) are subject to the SP process by using ball steel with the parameters (Pressure=12 bars, Speed=40 mm/min, Distance=150 mm, Shot size=2.25 mm, Coverage=100 %). The ultrasonic impact treatment (UIP) machine is used for enhancing the surface properties. For the Deep Cryogenic Treatment (DCT), the samples have been placed in the cooling chamber. A standard tensile test specimen is prepared in a round section with the dimensions chosen according to ASTM (A370-11). Tensile and fatigue of rotating bending with R=–1 have been conducting, after the effect of deep cryogenic treatment (DCT), combined shot peening (SP+DCT), and ultrasonic impact peening (UIP+DCT) of AA7001 have been examining. The maximum improvement percent in ultimate tensile strength (UTS) due to (DCT), (SP+DCT), and (UIP+DCT) were about 3 %, 8.27 %, and 6.25 %, respectively. The rise in the yield stress due to (DCT), (SP+DCT), and (UIP+DCT) were 9.5 %, 14.6 %, and 13.14 %, respectively. The ductility reduced by constituents of 8.57 %, 12.5 %, and 11.42 % sequentially. The improvement in fatigue strength in a high cycle regime is 16 % for (SP+DCT) due to combined effects, it is an 8 % increase in the endurance limit on fatigue behavior due to inducing compressive residual stress (CRS)
format	article
author	Aseel A. Alhamdany Ali Yousuf Khenyab Qusay K. Mohammed Hussain Jasim M. Alalkawi
author_facet	Aseel A. Alhamdany Ali Yousuf Khenyab Qusay K. Mohammed Hussain Jasim M. Alalkawi
author_sort	Aseel A. Alhamdany
title	Development mechanical and fatigue properties of AA7001 after combined SP with deep cryogenic treatment and UIP with deep cryogenic treatment
title_short	Development mechanical and fatigue properties of AA7001 after combined SP with deep cryogenic treatment and UIP with deep cryogenic treatment
title_full	Development mechanical and fatigue properties of AA7001 after combined SP with deep cryogenic treatment and UIP with deep cryogenic treatment
title_fullStr	Development mechanical and fatigue properties of AA7001 after combined SP with deep cryogenic treatment and UIP with deep cryogenic treatment
title_full_unstemmed	Development mechanical and fatigue properties of AA7001 after combined SP with deep cryogenic treatment and UIP with deep cryogenic treatment
title_sort	development mechanical and fatigue properties of aa7001 after combined sp with deep cryogenic treatment and uip with deep cryogenic treatment
publisher	PC Technology Center
publishDate	2021
url	https://doaj.org/article/152067a7b3fb4bf4a4cbd729f053e7c5
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Development mechanical and fatigue properties of AA7001 after combined SP with deep cryogenic treatment and UIP with deep cryogenic treatment

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