The Influence of High R Ratio on Smooth Fatigue Behavior of 1045 Steel with Three Different Heat Treatments PDF Download
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Author: Murat Karadag
Publisher:
ISBN:
Category :
Languages : en
Pages : 250
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Author: Murat Karadag
Publisher:
ISBN:
Category :
Languages : en
Pages : 250
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Author: Trent J. Pals
Publisher:
ISBN:
Category :
Languages : en
Pages : 212
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Author: Thomas Robert Vantiger
Publisher:
ISBN:
Category :
Languages : en
Pages : 176
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Author: TH. Topper
Publisher:
ISBN:
Category : Axial loads
Languages : en
Pages : 19
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Book Description
During the past decade it has been observed that periodically applied overloads of yield stress magnitude can significantly reduce or eliminate crack closure under uniaxial or Mode I loading. This paper reports the results of a series of biaxial in-phase tension-torsion experiments that were performed to evaluate the effects of overloads on the fatigue life of smooth tubes constructed of normalized SAE 1045 steel. Five strain ratios were investigated, including uniaxial (? = ?xy/?xx = 0), pure torsion (? = ?), and three intermediate ratios (? = 3/4, 3/2, and 3). Periodically applied overloads of yield stress magnitude allowed cracks to grow under crack face interference-free conditions. Strain-life curves were developed by computationally removing the overload cycle damage from test results and calculating equivalent fatigue lives. A factor of two reduction in the fatigue limit was found at all ratios when these results were compared with constant-amplitude results. Cracking behavior was observed and it was noted that for strain ratios greater than one, cracks initiated along the rolling direction (longitudinally); otherwise, the cracks initiated on maximum shear planes. This observation was used to help explain the similarity in fatigue life results for all strain ratios for both constant-amplitude and overload data. Parameter-life curves were developed using the equivalent fatigue life data and several common multiaxial damage parameters, and the damage parameters were evaluated. It was found that the simple maximum shear strain criterion together with uniaxial overload data provided a good estimate of the fatigue behavior for all strain ratios.
Author: Tim Wehner
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 136
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Author: George E. Totten
Publisher: ASM International
ISBN: 1615032274
Category : Technology & Engineering
Languages : en
Pages : 496
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Book Description
Annotation Examines the factors that contribute to overall steel deformation problems. The 27 articles address the effect of materials and processing, the measurement and prediction of residual stress and distortion, and residual stress formation in the shaping of materials, during hardening processes, and during manufacturing processes. Some of the topics are the stability and relaxation behavior of macro and micro residual stresses, stress determination in coatings, the effects of process equipment design, the application of metallo- thermo-mechanic to quenching, inducing compressive stresses through controlled shot peening, and the origin and assessment of residual stresses during welding and brazing. Annotation c. Book News, Inc., Portland, OR (booknews.com)
Author: Shugen Peng
Publisher:
ISBN:
Category :
Languages : en
Pages : 286
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Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 636
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Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 1088
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Author: DL. DuQuesnay
Publisher:
ISBN:
Category : Compression
Languages : en
Pages : 11
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Book Description
Smooth cylindrical specimens of 2024-T351 aluminum alloy and SAE 1045 steel were tested under constant amplitude cycling to study the effect of compressive stress on fatigue life. The results show a reduction in the fatigue life at constant maximum stress as the compressive portion of the stress cycle is increased.
