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strain-hardening exponent

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Series: ASM Technical Books
Publisher: ASM International
Published: 15 June 2021
DOI: 10.31399/asm.tb.mpktmse.t56010019
EISBN: 978-1-62708-384-3
... force, sample lengthening, and machine stiffness, and with mechanical properties and parameters such as elastic modulus, Young’s modulus, strength coefficient, strain-hardening exponent, and modulus of resilience. They also cover a wide range of materials including various grades of aluminum and steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700071
EISBN: 978-1-62708-279-2
... as 1800 MPa (261 ksi) have been identified for future requirements of anti-intrusion components. The rate of increase in strength with plastic strain is defined as the strain-hardening exponent, n . High work-hardening exponent n gives metals the ability to stretch by distributing the strains more...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700135
EISBN: 978-1-62708-279-2
... combination of high tensile strength exceeding 1000 MPa (145 ksi), a very high ductility of 60 to 90% elongation, and a high strain-hardening exponent, n , of 0.48. Twinning-induced plasticity steels have a low stacking fault energy (SFE) of ~30 mJ/m –2 , which produces extensive mechanical twinning under...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400033
EISBN: 978-1-62708-316-4
... K is the strength coefficient and n is the strain-hardening exponent. Some other equations are listed in Table 4.1 . Table 4.1 Flow curve equations ( Ref 4.3 , 4.12 , 4.13 ) Name Equation Comments Ludwik σ ¯ = σ 0 + K ɛ ¯ n σ 0...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540121
EISBN: 978-1-62708-309-6
... of a compression stress-strain curve OA ′ B ′ with its compression yield stress (or elastic limit in compression) at point A ′. These two curves are similar and symmetrically positioned. In other words, the degrees of work hardening and the absolute yield stresses are the same for both tension and compression...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610025
EISBN: 978-1-62708-303-4
... holds for the metal in question. The slope of the straight line is n , and K is equal to the true stress at a true strain ε = 1.0. The strain-hardening exponent can have values from n = 0 for a perfectly plastic solid up to n = 1.0 for a perfectly elastic solid. Metals typically have values of n...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240201
EISBN: 978-1-62708-251-8
...: (Eq 12.18) σ   =   K ε n where n is the strain-hardening exponent, and K is the strength coefficient. Equation 12.18 can be rewritten as: (Eq 12.19) log   σ   = ​   log   K   + n     log   ε As shown in Fig. 12.12 , a log-log plot of true stress versus...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400105
EISBN: 978-1-62708-316-4
... strain-hardening exponent, n ( σ ¯ = K ε ¯ n ) Increasing normal anisotropy ( r ¯ -value) Decreasing planar anisotropy (Δ r -value) In progressive and transfer die applications, several consecutive draw operations are used, and the practical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060049
EISBN: 978-1-62708-261-7
.... , Precipitation Hardening in the First Aerospace Aluminum Alloy: The Wright Flyer Crankcase , Science , Vol 266 ( No. 5187 ), Nov 1994 , p 1015 – 1017 10.1126/science.266.5187.1015 When a force or a combination of forces are applied to a material, the material responds by deforming or straining...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310173
EISBN: 978-1-62708-286-0
.... This value within a given class of materials is proportional to the strain-hardening exponent because a higher work-hardening rate causes higher localized resistance to thinning, which is the precursor of failure. Fig. 3 Forming limit diagram of carbon steel compared to austenitic stainless steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000111
EISBN: 978-1-62708-313-3
... of an alloy is typically quantified by the strain-hardening exponent ( n ) in the Holloman equation for true stress (ε t ) versus true strain (ε t ): (Eq 6.1) σ t = K ⁢ ε t n where K is a strength coefficient. A study on alloy 718 demonstrates that its work-hardening behavior...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700151
EISBN: 978-1-62708-279-2
... compared to the other listed advanced high-strength steels (AHSS) grades. The high value of the strain-hardening exponent, n , is responsible for the excellent ductility of AUST SS. Table 10.3 Mechanical properties of various AHSS grades Steel grade Yield strength, MPa (ksi) Tensile strength...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700115
EISBN: 978-1-62708-279-2
... Ranges of yield strength, tensile strength, total elongation, and strain-hardening exponent for three types of TRIP steels are listed in Table 7.3 . Also listed is the increase in yield strength due to bake hardening. Table 7.3 Mechanical properties of various types of TRIP steels Steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400073
EISBN: 978-1-62708-316-4
... Elongation in 50 mm (2 in.), % Plastic-strain ratio ( r ) Strain-hardening exponent ( n ) Hardness (HRB) MPa ksi MPa ksi Hot rolled Commercial quality 358 52 234 34 35 1.0 0.18 58 Drawing quality 345 50 220 32 39 1.0 0.19 52 Drawing quality, aluminum killed 358 52...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500179
EISBN: 978-1-62708-317-1
... Engineering , Metal Forming Handbook , Springer , 1998 9.20 Kervick R.J. and Springborn R.K. , “Cold Bending and Forming Tube and Other Sections,” American Society of Tool and Manufacturing Engineers , 1966 9.21 Fuchizawa S. , Influence of Strain Hardening Exponent...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040083
EISBN: 978-1-62708-300-3
... test is improved by minimizing the target function defined in load-stroke curves [ Zhiliang et al., 2002 ]. In cold forging, K and n are the two material parameters (i.e., the material strength coefficient, K, and the strain hardening exponent, n) used to define the stress-strain relationship...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610147
EISBN: 978-1-62708-303-4
... fatigue data. It compares the Gerber, Goodman, and Soderberg methods for predicting the effect of mean stress from bending data, describes the statistical nature of fatigue measurements, and explains how plastic strain causes cyclic hardening and softening. It discusses the work of Wohler, Basquin...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500133
EISBN: 978-1-62708-317-1
... (145 °F/s); strain rate = 0.1 s –1 . Source: Ref 7.9 With increase in temperature, there is a decrease in the flow-stress values and the work-hardening exponent. Furthermore, the curve shows an asymptotic trend around 700 to 800 °C (1290 to 1470 °F). This behavior is due to the temperature...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140193
EISBN: 978-1-62708-335-5
... strength MPa (ksi), X, 283 (41.1), Y, 266 (38.6), Z, 252 (36.6); strain hardening exponent ( n ), X, 0.083, Y, 0.087, Z, 0.091; strain-hardening coefficient K , MPa (ksi), X, 388 (56.4), Y, 397 (57.6), Z, 382 (55.4). UNS A13560 Source: Fatigue and Fracture Toughness ofA356-T6 Cast Aluminum Alloy , R.I...
Series: ASM Technical Books
Publisher: ASM International
Published: 15 June 2021
DOI: 10.31399/asm.tb.mpktmse.9781627083843
EISBN: 978-1-62708-384-3