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flow strength

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Published: 30 September 2023
Figure 9.4: Optimum die angle as a function of draw stress, flow strength, and percent reduction [ 11 ]. Reprinted by permission of Pearson Education, Inc. More
Image
Published: 01 August 2013
Fig. 15.24 Cross section and flow strength profiles in flexible rolled coil. Source: Ref 15.10 More
Image
Published: 01 June 1983
Figure 9.12 Temperature dependence of tensile flow strength at 0.2% offset, σ 0 . 2 , and estimated strength at which α ′ begins to form, α ′, of stable and metastable Fe–Cr–Ni steels ( Suzuki etal., 1977 ). More
Image
Published: 01 June 1983
Figure 9.17 The differences between the flow strengths, σ ϵ of lithium and potassium at tensile strains of 0.02, 0.05, and 0.10 and temperatures 295, 195, 77, 20, and4 K ( Hands and Rosenberg, 1969 ; Hull and Rosenberg, 1959 ; Reed, 1977 ). More
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Published: 01 January 2015
Fig. 11.14 Lower yield strength, flow stresses at various strains, and fracture stress as a function of grain size in low-carbon steels. Source: Ref 11.26 More
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Published: 01 August 2012
Fig. A.15 Flow stress of five advanced high strength steel (AHSS) sheet materials obtained by viscous pressure bulge test. Experimental strain range, bulge test, DP 980: 0.05 to 0.3; bare DP 780: 0.05 to 0.33; DP 780 T-Al type: 0.05 to 0.31; DP 780 Y-type U: 0.05 to 0.35; DP 780 Y-type V: 0.05 More
Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390007
EISBN: 978-1-62708-459-8
... deformation, yield criteria, flow strength, and the application of flow rules. It explains how to calculate the work involved in deformation processes, how to assess the propensity for fracture, how to determine temperature rise and strain distribution in the workpiece, and how to classify metalworking...
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Published: 01 January 2015
Fig. 5.12 Stress-strain relationship. (a) True stress/true strain derived from tensile testing a specimen and measuring the actual area at each strain. (b) Strengthening effect of manganese on flow strength of titanium-manganese alloys annealed at 750 °C (1380 °F) More
Image
Published: 01 June 1983
Figure 9.32 The effects of tensile prestrain at 298 and 371 K on the subsequent transformation-to-martensite temperature, T ms(d) , and on the influence of tensile stress on the temperature at which the flow strength decreases with continued loading, T mσ ( Richman and Bolling, 1971 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700225
EISBN: 978-1-62708-279-2
... on active drawbeads shows that a controllable restraining force, caused by adjusting the penetration of drawbeads, can improve sheet metal formability ( Ref 15.6 ). Drawbead restraining forces, at a constant depth, increase with the flow strength of the sheet metal because bending deformation around...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860295
EISBN: 978-1-62708-348-5
... to accommodate the shape change of the martensitic shear transformation. In Fig. 9.1 , a range of possible T ms values is illustrated. Characteristics such as flow strengths, defect formation energies, and elastic constants affect the ease of transformation by contributing to the strain energies associated...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390284
EISBN: 978-1-62708-459-8
... extrusion theories lead to solutions where the extrusion pressure p e at the end of the stroke is proportional to strain, or: (10.5) p e = σ f   m ( a + b ϵ ) , where σ fm is the mean flow strength of the material. The term in parentheses takes into account the pressure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860237
EISBN: 978-1-62708-348-5
... for further plastic strain is commonly referred to as the flow stress; the flow stress at which plastic strain is first detected is called the critical resolved shear strength . Because the flow stress depends on the strain, it cannot be used as a material property unless the strain level is specified...
Image
Published: 30 April 2020
Fig. 5.16 Comparative plots of different flow responses. Newtonian flow is ideal, with a linear relation between applied stress and flow rate. Most powder-binder feedstock has a yield strength, so flow initiates after a required strength is exceeded. Generally, the flow rate changes More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700177
EISBN: 978-1-62708-279-2
... is determined by the work-hardening rate of the material; its tensile strength level increases with increase in that rate. Increased work hardening creates higher loads on press, tools, lubricant, and other load points. In a forming operation, the flow stress determines the magnitude of the forming load...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410405
EISBN: 978-1-62708-265-5
... tensile strength associated with necking instability and nonuniform deformation. The fracture surface of the 4340 specimen showed cleavage facets, a possible result of dynamic strain aging that limits ductility. Fig. 18.2 Flow stresses as a function of test temperature and strain rate...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240279
EISBN: 978-1-62708-251-8
... deformation of the metal). Since the flow stress decreases with increasing temperature, metals become more malleable, and less energy is needed to produce a given amount of deformation. However, as the temperature increases, the strength also decreases. Therefore, hot working processes usually involve the use...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390064
EISBN: 978-1-62708-459-8
... are stiffened by a structure that has to be broken down before flow can begin; a definite yield strength is first measured beyond which the stress is again a function of strain rate, as in a viscous fluid ( Fig. 5.3b ). Such substances are exemplified by greases in which the soap structure must be broken down...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780055
EISBN: 978-1-62708-281-5
... for predicting plastic part performance (stiffness, strength/impact, creep/stress relaxation, and fatigue) integrated with manufacturing concerns (flow length and cycle time) are demonstrated for design and material selection. plastics material selection materials design plastic parts stiffness impact...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060239
EISBN: 978-1-62708-355-3
... plays on the properties of typical engineering materials is discussed also. Important safety concerns associated with low-temperature testing are reviewed. Mechanical Properties at Low Temperatures In general, lowering the temperature of a solid increases its flow strength and fracture strength...