Author: Dente Duncan Poland
Publisher:
ISBN:
Category :
Languages : en
Pages : 174

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Author: RI. Stephens
Publisher:
ISBN:
Category : Constant amplitude
Languages : en
Pages : 30

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Book Description
Density and sintering temperature effects were investigated with FL4405 low alloy P/M high strength steel. Monotonic tensile stress-strain, plane strain fracture toughness and fatigue behavior of smooth, notched and cracked specimens were investigated under both constant and variable amplitude loading. Two density levels, 7.0 and 7.4 g/cm3 and two sintering temperatures, 1120 and 1315‡C, were evaluated. The increased density resulted in smaller pore size and pore volume and the increased sintering temperature resulted in greater pore roundness. All final fracture surfaces were brittle at the macro level while containing ductile dimples at the micro level. Fatigue surfaces contained cleavage only, ductile dimples only or mixed cleavage and ductile dimple morphology with no striations nor beachmarks. Increasing the density resulted in significant higher tensile strength, elastic modulus, ductility, fracture toughness and fatigue resistance. Increasing the sintering temperature, and hence increasing pore roundness, resulted in additional enhancement of these properties. However, this increase was not as significant as that of the density increase.

Author: Richard C. Rice
Publisher: ASTM International
ISBN: 0803124856
Category : Materials
Languages : en
Pages : 203

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Contains papers from a May 1997 symposium held in St. Louis, addressing different aspects of product quality as it relates to structural integrity, and the influence of design criteria on structural integrity. Topics include low-cycle fatigue testing of tubular material using non-standard specimens,

Author:
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 210

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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1042

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Author: Mark Benjamin Vollmers
Publisher:
ISBN:
Category :
Languages : en
Pages : 194

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Author: P. R. Bhowal
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 11

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Author: Trent J. Pals
Publisher:
ISBN:
Category :
Languages : en
Pages : 212

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Author: RI. Stephens
Publisher:
ISBN:
Category : Crack initiation
Languages : en
Pages : 14

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Room temperature fatigue behavior was obtained for eight different steels, including cast, hot-rolled, quenched and tempered, and case-hardened steels, under both constant and variable amplitude load conditions. Constant amplitude fatigue crack growth behavior was obtained with compact-type specimens with load ratios R ? 0 and -1. Variable amplitude fatigue behavior was obtained from keyhole-notched compact-type specimens by using the Society of Automotive Engineers' transmission history and three modifications of this history including single tensile overloads. The keyhole specimen and the variable amplitude spectra were chosen to simulate room temperature real-life situations including both crack initiation and crack propagation. Fatigue behavior of the eight steels is compared.

Author: Kyle Michael Sigl
Publisher:
ISBN:
Category :
Languages : en
Pages : 216

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