Fatigue behavior in hot rolled plain-carbon and high strength low alloy steels PDF Download
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Author: Jeffrey Perout (J.)
Publisher:
ISBN:
Category : Metals
Languages : en
Pages :
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Author: Jeffrey Perout (J.)
Publisher:
ISBN:
Category : Metals
Languages : en
Pages :
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Author: MT. Yu
Publisher:
ISBN:
Category : Cold rolling
Languages : en
Pages : 7
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A SAE Grade 945X HSLA steel was cold rolled to 30% and 61% thickness reductions. Monotonic tensile tests, smooth and notched specimen fatigue tests, and crack propagation tests were performed. The effect of loading direction was examined. As a general rule, cold rolling increased strength and decreased ductility. The strength was higher and the ductility was lower in the direction transverse to the rolling direction than in the longitudinal or rolling direction. The increase in smooth specimen fatigue strength was not as great as the increase in monotonic strength due to significant cyclic softening of the cold rolled metals. The notched fatigue strength was only slightly increased by cold rolling, since two opposing factors (the smooth specimen fatigue strength and notch sensitivity) were increased by cold rolling. The crack propagation rate and the threshold stress intensity were not significantly affected by cold rolling. All strength parameters of the SAE 945X HSLA steel, both hot rolled and cold rolled, were higher than those of a SAE 1010 plain carbon steel previously investigated.
Author: T. E. Parker
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 11
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Author: Roger Pearce
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
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Author: JH. Chung
Publisher:
ISBN:
Category : Crack growth
Languages : en
Pages : 21
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Five common carbon or low-alloy cast steels--SAE 0030, SAE 0050A, C-Mn, Mn-Mo and AISI 8630--were subjected to constant-amplitude fatigue tests at room temperature and at the common low climatic temperature of -45°C (-50°F). Tests included smooth specimen axial low and high cycle fatigue and compact type (CT) specimen crack growth behavior from 10-5 n/cycle (4 x 10-4 in./cycle) to threshold values at 10-10 m/cycle (4 x 10-9 in./cycle). Three of the five steels had nil ductility transition temperatures above the low test temperature. Despite this, all five cast steels showed equivalent or better fatigue resistance at the low temperature, except for some very short life low-cycle fatigue tests and for some very high fatigue crack growth rates where fracture was imminent. Scanning electron fractographic analysis indicated that ductile type fatigue crack growth mechanisms with or without striations occurred for all steels at both test temperatures except for a few interdispersed cleavage facets in 0050A steel at very high crack growth rates. At the low temperature, monotonic and cyclic stress-strain properties Su, Sy, and Sy' increased by an average of about 10%, fatigue limits increased from 2 to 25%, and ?Kth increased from 0 to 90%. No consistent correlations existed between fatigue and monotonic properties at either temperature. Mean stress effects at near ?Kth levels appeared to be influenced by crack closure.
Author: Shrikant P. Bhat
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 10
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Author: Jean-Yves Adrien Bérard
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 176
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
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The graphs presented display metals fatigue information from various sources of published and unpublished test reports which have been processed and regenerated through a semi-automatic data processing system. Each series or set of graphs contain descriptive information (legends) which identifies the material, test procedure, test conditions and the most significant test and/or material variables associated with the plotted data. The data displayed in each set of graphs is intended to answer general questions and to serve as a guide to further investigations of specific areas within the subject presented.
Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 1622
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Author: J. E. Stallmeyer
Publisher:
ISBN:
Category : Strength of materials
Languages : en
Pages : 53
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