Effect of optimal shot peening time on fatigue life for aluminum alloy 6061-T651

The compressive residual stresses generated by shot peening, is increased in a direct proportional way with shot peening time (SPT). For each metal, there is an optimum shot peening time (O.S.T) which gives the optimum fatigue life. This paper experimentally studied to optimize shot peening time of...

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Autor principal:	Ahmed N. Al-Khazraji
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2019
Materias:	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/8ab2e4358e934c949c6ccf520464b34f
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spelling	oai:doaj.org-article:8ab2e4358e934c949c6ccf520464b34f2021-12-02T05:52:07ZEffect of optimal shot peening time on fatigue life for aluminum alloy 6061-T65110.22153/kej.2017.05.0011818-11712312-0789https://doaj.org/article/8ab2e4358e934c949c6ccf520464b34f2019-03-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/405https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 The compressive residual stresses generated by shot peening, is increased in a direct proportional way with shot peening time (SPT). For each metal, there is an optimum shot peening time (O.S.T) which gives the optimum fatigue life. This paper experimentally studied to optimize shot peening time of aluminium alloy 6061-T651 as well as using of and analysis of variance (ANOVA). Two types of fatigue test specimens’ configuration were used, one without notch (smooth) and the other with a notch radius (1,25mm), each type was shot peened at different time. The (O.S.T) was experimentally estimated to be 8 minutes reaching the surface stresses at maximum peak of -184.94 MPa. A response surface methodology (RSM) is presented to optimize the surface properties of fatigue life due to effect of two parameters (shot peening time and fatigue stresses). A statistical software was used to perform analysis of variance (ANOVA) to predict the optimum shot peening time. The results were 8.007 minutes without notch and 7.53 minutes with notch. Two 2nd degree polynomials were obtained for the two studied cases with confidence level of 95%. Experimentally26.67% enhancement in fatigue life was obtained, but after using (RSM), the results gave 61% improvement, compared with ref. [2]. Ahmed N. Al-KhazrajiAl-Khwarizmi College of Engineering – University of BaghdadarticleChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 13, Iss 4 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Ahmed N. Al-Khazraji Effect of optimal shot peening time on fatigue life for aluminum alloy 6061-T651
description	The compressive residual stresses generated by shot peening, is increased in a direct proportional way with shot peening time (SPT). For each metal, there is an optimum shot peening time (O.S.T) which gives the optimum fatigue life. This paper experimentally studied to optimize shot peening time of aluminium alloy 6061-T651 as well as using of and analysis of variance (ANOVA). Two types of fatigue test specimens’ configuration were used, one without notch (smooth) and the other with a notch radius (1,25mm), each type was shot peened at different time. The (O.S.T) was experimentally estimated to be 8 minutes reaching the surface stresses at maximum peak of -184.94 MPa. A response surface methodology (RSM) is presented to optimize the surface properties of fatigue life due to effect of two parameters (shot peening time and fatigue stresses). A statistical software was used to perform analysis of variance (ANOVA) to predict the optimum shot peening time. The results were 8.007 minutes without notch and 7.53 minutes with notch. Two 2nd degree polynomials were obtained for the two studied cases with confidence level of 95%. Experimentally26.67% enhancement in fatigue life was obtained, but after using (RSM), the results gave 61% improvement, compared with ref. [2].
format	article
author	Ahmed N. Al-Khazraji
author_facet	Ahmed N. Al-Khazraji
author_sort	Ahmed N. Al-Khazraji
title	Effect of optimal shot peening time on fatigue life for aluminum alloy 6061-T651
title_short	Effect of optimal shot peening time on fatigue life for aluminum alloy 6061-T651
title_full	Effect of optimal shot peening time on fatigue life for aluminum alloy 6061-T651
title_fullStr	Effect of optimal shot peening time on fatigue life for aluminum alloy 6061-T651
title_full_unstemmed	Effect of optimal shot peening time on fatigue life for aluminum alloy 6061-T651
title_sort	effect of optimal shot peening time on fatigue life for aluminum alloy 6061-t651
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2019
url	https://doaj.org/article/8ab2e4358e934c949c6ccf520464b34f
work_keys_str_mv	AT ahmednalkhazraji effectofoptimalshotpeeningtimeonfatiguelifeforaluminumalloy6061t651
_version_	1718400181882322944

Effect of optimal shot peening time on fatigue life for aluminum alloy 6061-T651

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