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notch sensitivity

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Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006344
EISBN: 978-1-62708-179-5
... provides information on the classification of gray irons based on ASTM International specification A48/A48M. It discusses the loading effect, surface effect, notch sensitivity, and environmental effect on the mechanical properties of gray iron. The chemical composition ranges of some of the more widely...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006339
EISBN: 978-1-62708-179-5
... treatments such as rolling, peening, or machining after heat treatment, the fatigue strength of ADI is increased significantly. Austempered ductile iron is moderately notch sensitive in fatigue, with a notch sensitivity ratio (ratio of notched to unnotched endurance limits) ranging from 1.2 to 1.6...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002418
EISBN: 978-1-62708-193-1
... The calculated notch sensitivity for a material with long, brittle reinforcements that may fracture as the crack extends Fig. 10 The notch insensitivity found experimentally for ceramic-matrix composites caused by stress redistribution Fig. 11 Basic cell model (hysteresis loops) used...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003400
EISBN: 978-1-62708-195-5
... of the FPZ, independent of plastic shielding. Fig. 3 The three common classes of fracture behavior in CFCCs. Source: Adapted from Ref 8 Fig. 1 Notch sensitivity. Effects of hole diameter on the tensile strength of metals, CFCCs ( Ref 2 , 3 ), and polymer-matrix composites (PMCs) ( Ref...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003288
EISBN: 978-1-62708-176-4
... in tension are similar to those used for short-time tensile tests. Notched specimens are discussed later in this article. Specimens with round cross sections have threaded ends, except those used at very high temperatures or those of materials that are difficult to machine or display high sensitivity...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003261
EISBN: 978-1-62708-176-4
... on standard smooth tensile specimens do not always reveal metallurgical or environmental changes that lead to reduced local ductility. The tendency for reduced ductility in the presence of a triaxial stress field and steep stress gradients (such as occur at a notch) is called notch sensitivity. A common way...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002396
EISBN: 978-1-62708-193-1
... Fig. 25 Examples of microdiscontinuities that affect fatigue behavior of ferrous systems ( Ref 35 ) Fig. 26 Effect of notch size on fatigue notch sensitivity of steels as a function of hardness (HB) Fig. 4 Representation of stress-strain and strain-life behavior Fig...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006317
EISBN: 978-1-62708-179-5
...% pearlite CGI (0.24% Cr, 0.28% Mo) 235 150 22 432 63 360 52 Table 3 Fatigue and notch-sensitivity data in rotating-bending fatigue Ref No. Iron type (a) Pearlite, % Nodularity, % Hardness, BHN Ultimate tensile strength Fatigue limit Endurance ratio Fatigue strength reduction...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002398
EISBN: 978-1-62708-193-1
... Table 1 Fatigue notch sensitivity of several cast and wrought steels ( R =−1) Steel Tensile strength Endurance limit Fatigue endurance ratio Fatigue notch sensitivity factor (b) , q Unnotched Notched (a) MPa ksi MPa ksi MPa ksi Unnotched Notched Normalized...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003516
EISBN: 978-1-62708-180-1
..., the fatigue notch factor is obtained by dividing the endurance limit of an unnotched test specimen by the endurance limit of a notched test specimen. The fatigue notch factor can also be defined in terms of notch sensitivity, q : K f = q ( K t − 1 ) + 1 where K f...
Book Chapter

By Malcolm Blair
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001023
EISBN: 978-1-62708-161-0
... sulfur limit for carbon and low-alloy steels is 0.06%, and the normal phosphorus limit is 0.05%. References 1. Barson J.M. and Rolfe S.T. , Correlation Between Charpy V-Notch Test Results in the Transition-Temperature Range , in Impact Testing of Metals...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003104
EISBN: 978-1-62708-199-3
.... Ductility is also an important factor that influences notch sensitivity and creep-fatigue interaction...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002399
EISBN: 978-1-62708-193-1
... Endurance ratio (b) Endurance limit, S n Endurance ratio (c) Notch sensitivity factor (d) MPa ksi MPa ksi MPa ksi 64-45-12 490 71 210 30.5 0.43 145 21 0.30 1.4 80-55-06 620 90 275 40 0.44 165 24 0.27 1.7 120-90-02 (e) 930 135 338 49 0.36 207 30 0.22...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003668
EISBN: 978-1-62708-182-5
... load zero) at a frequency of 50 Hz and temperature of 23 °C (73 °F). (a) Smooth specimens. (b) Notched specimens. Source: Ref 40 Fig. 6 Variation of notch sensitivity index with notch radius for steels tested in bending or axial fatigue loading. t , thickness. Source: Ref 38 Fig...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006345
EISBN: 978-1-62708-179-5
... times the tensile strength obtained in a Wöhler reversed-bending test. The fatigue limit decreases with increasing hardness to approximately 0.4 times the tensile strength in hardened irons up to 740 MPa (107 ksi) and may be even lower in stronger irons. Ductile irons are notch sensitive...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005676
EISBN: 978-1-62708-198-6
... behavior. Other unique features that set polymers apart from metals and ceramics include aging and weathering, chemical resistance, environmental stress cracking, notch sensitivity, residual stresses and weld lines from processing, process-driven morphology, and the effects of additives, fillers...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005324
EISBN: 978-1-62708-187-0
... times the tensile strength obtained in a Wöhler reversed-bending test. The fatigue limit decreases with increasing hardness to approximately 0.4 times the tensile strength in hardened irons up to 740 MPa (107 ksi) and may be even lower in stronger irons. Ductile irons are notch sensitive...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001038
EISBN: 978-1-62708-161-0
... stress levels and short cycles, the factor is usually less than at lower stress levels and longer cycles because of a reduction of the notch effect by plastic deformation. Fatigue notch sensitivity, q , is determined by comparing the fatigue notch factor, K f , and the theoretical stress...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003445
EISBN: 978-1-62708-195-5
...Behavior of carbon-epoxy versus metals under various conditions Table 1 Behavior of carbon-epoxy versus metals under various conditions Condition Carbon-epoxy behavior relative to metals Stress-strain relationship More linear strain to failure Static notch sensitivity Greater...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002374
EISBN: 978-1-62708-193-1
... the P/M steels exhibit less notch sensitivity than wrought steels, because pores inherently act to blunt cracks and redistribute the load, especially under complex loading. Open pores, which dominate the sintered microstructure for densities below 92% of theoretical, retard fatigue crack propagation...