Fatigue stability of residual stress in shot peened alloys

Boggs, Brian D.; Byrne, J. G.

doi:10.1007/bf02643281

Cited by 14 publications

(2 citation statements)

References 8 publications

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“…Zhuang and Halford 84 have published models of SP residual stress stability in IN718 without validating experimental measurements. Boggs and Byrne 85 performed some early work on cyclic stability of SP stresses in two nickel–cobalt alloys, noting moderate relaxation in one alloy and little relaxation in the other, but providing few details.…”

Section: Peening and Related Surface Treatmentsmentioning

confidence: 99%

A literature survey on the stability and significance of residual stresses during fatigue

McClung

2007

Fatigue Fract Eng Mat Struct

300

181

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A B S T R A C T Many manufacturing processes can induce residual stresses in components. These residual stresses influence the mean stress during cyclic loading and so can influence the fatigue life. However, the initial residual stresses induced during manufacturing may not remain stable during the fatigue life. This paper provides a broad and extensive literature survey addressing the stability of surface and near-surface residual stress fields during fatigue, including redistribution and relaxation due to static mechanical load, repeated cyclic loads, thermal exposure and crack extension. The implications of the initial and evolving residual stress state for fatigue behaviour and life prediction are addressed, with special attention to fatigue crack growth. This survey is not a critical analysis; no detailed attempt is made to evaluate the relative merits of the different explanations and models proposed, to propose new explanations or models or to provide quantitative conclusions. Primary attention is given to the residual stresses resulting from four major classes of manufacturing operations: shot peening and related surface treatments, cold expansion of holes, welding and machining. A = function of material and temperature C = empirical constant CX = cold expansion DOD = Department of Defence DR = deep rolling EP = electropolished FAA = Federal Aviation Administration FCG = fatigue crack growth FE = finite element FTI = Fatigue Technology, Inc. GBP = glass bead peening GP = gravity peening JSSG = Joint Service Specification Guide k = Boltzmann's constant LBP = low plasticity burnishing LCF = low-cycle fatigue LSP = laser shock peening m = empirical constant Correspondence: R. C. McClung. Fatigue Fract Engng Mater Struct 30, 173-205 173 174 R. C. McCLUNG Q = effective activation energy for residual stress relaxation R = stress ratio S-N = Stress-Life SP = shot peening SR = stress relieved t = time T = Temperature USAF = United States Air Force WP = water peening σ RS = residual stress 3D = three-dimensional

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Section: Peening and Related Surface Treatmentsmentioning

confidence: 99%

A literature survey on the stability and significance of residual stresses during fatigue

McClung

2007

Fatigue Fract Eng Mat Struct

300

181

View full text Add to dashboard Cite

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“…For many applications, however, the induced residual stress fields can be of lesser importance than the resultant fatigue life enhancement. As an example, in aerospace vehicle applications, fatigue lives are of interest not the underlying residual stress fields (Bendetti et al , 2009; Boggs and Byrne, 1973).…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of simulated fatigue life estimates in laser‐peened aluminum

Spradlin

Grandhi

Langer

2011

International Journal of Structural Integrity

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PurposeThe purpose of this paper is to develop and implement a structural fatigue life estimation framework that includes laser‐peened (LP) residual stresses and then experimentally validates these fatigue life estimations.Design/methodology/approachA three‐dimensional finite element analysis of an Al 7075‐O three‐point bending coupon being LP was created and used to estimate the fatigue life when loaded. Fatigue tests were conducted to validate these estimations.FindingsThe framework developed for fatigue life estimation of LP‐processed coupons yielded estimates with goodness‐of‐fit between the log‐transformed experimental and analytical data of R2=0.97 for the baseline coupons and R2=0.94 for the LP‐processed coupons.Research limitations/implicationsApproximated ε‐life fatigue parameters were used to calculate the fatigue life resulting from the complex residual stress fields due to the simulated LP process.Originality/valueA fatigue life estimation framework that considers LP residual stress fields has been developed for use on structural components.

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