Tensile tests of solid solution treated 7050 aluminum alloy were conducted to different strain degrees (0.1, 0.4, 0.6 and failure) at 460 °C with the strain rate of 1.0 × 1041.0 × 101s
Characterization of strain aging with full-field strain studying dynamic strain aging comprise tensile tests at different constant strain rates and tem-peratures, resulting in numerous specimens to be tested. Applicability of a novel experimental technique was scrutinized. A temperature gradient was introduced to tensile specimens, and strains were recorded in full-field with digital image correlation.
Nov 01, 2012 · Effect on the pre-treatment of SHCC at various temperatures on its residual tensile behavior of SHCC under the strain rate of 3 × 10 4 s 1. Table 4 . Summary of the residual tensile tests performed at the strain rate of 310 4 s 1 ; average values (standard deviations are
Effect of Strain Aging on Stages of Plastic Strain and Mechanisms of Luders deformation in tensile tests of specimens of steel 08G2B with ultrafine ferrite-bainite structure are studied by the method of digital image correlation. The fields of displacements of yy and xy and their distribution over the length of a specimen are determined. Two kinds of Luders deformation differing in the behavior of the ChernovLuders bands are detected.
Effect of Strain Aging on Tensile Behavior and Properties The effect of strain aging on tensile behavior and properties of API X60, X70, and X80 pipeline steels was investigated in this study. The API X60, X70, and X80 pipeline steels were fabricated by varying alloying elements and thermomechanical processing conditions. Although all the steels exhibited complex microstructure consisting of polygonal ferrite (PF), acicular ferrite, granular bainite
The effect of strain aging on tensile behavior and properties of API X60, X70, and X80 pipeline steels was investigated in this study. The API X60, X70, and X80 pipeline steels were fabricated by varying alloying elements and thermomechanical processing conditions. Although all the steels exhibited complex microstructure consisting of polygonal ferrite (PF), acicular ferrite, granular bainite
Effect of Strain Rate on Tensile Ductility and Fracture strain curves of columnar-grained nt-Cu tested at different strain rates, ranging from 10 5 to 10 2 s 1. Fig. 3. Variations of uniform elongation d u and elongation-to-failure d f of columnar-grained nt-Cu as a function of strain rate e. Z. You et al./Effect of Strain Rate on Tensile Ductility and Fracture Behavior
Effect of static strain aging on the fatigue behavior of The aging behavior was determined primarily for the as-received (AR) as well as in the homogenization and normalizing heat treated (H+N heat treated) condition. The yield stresses before and after aging process as well as the hardness values of the aged steels were measured for the assessment of the strain aging progress.
Jan 10, 2018 · In this study strain rate jumping testing was carried in order to separate the contribution of dynamic strain aging and deformation twin on the flow stress. Additionally, the effect of dynamic strain aging on deformation twinning behavior was discussed in terms of twinning stress and effective stacking fault energy. 2. Experimental
Effect of strain rate on the tensile properties of Dec 01, 2000 · Tensile data for specimens of V4Cr4Ti irradiated in the HFBR experiment to 0.5 dpa were reported previously, and a full tabulation of the tensile data, including the effects of strain rate may be found in , , .Tensile curves for V4Cr4Ti irradiated and tested at five different temperatures using a strain rate of 10 3 s 1 are presented in Fig. 2.
Effects of Dynamic Strain-Aging and Cyclic Loading on Mar 04, 2009 · The reasons could lie in the applied strain-rates; while J1c tests were performed on A533B steel using 3-point bend tests on Charpy type specimens, CT specimens were used for A516 steel. However, tensile and 3-point bend tests on similar grade A516 steel of different vintage did exhibit distinct drop in the energy to fracture.
The effects of deformation strain and aging temperature on strain aging behavior in a 304 stainless steel were investigated. Age hardening of a cold-rolled 304 stainless steel was significantly influenced by the amount of -martensite as well as aging temperature. The similar variation of tensile strength to the amount of -martensite with aging temperature indicated that tensile
GATE Metallurgical Engineering:Yield point and strain agingThis dynamic strain-aging behavior is called the portevin-Lechatelier effect. Dislocation arrest and release by solute atoms are reasons for these serrations.Mechanical twinning during deformation or stress-assisted martensitic transformation also produce the same effect.
High Temperature Plastic Instability and Dynamic Strain High Temperature Plastic Instability and Dynamic Strain Aging in the Tensile Behavior of AISI 316 Stainless 507 Steel and DSA. Concurrent occurrence of DSA and thermal recovery determine the cyclic stress response at longer hold periods. Another relevant work on the possible simultaneous occurrence of martensitic transformation and DSA at 15°C
In addition, the stress-strain curves show obvious zigzag fluctuations in the strengthening stage at 650 °C and 750 °C. This phenomenon is usually related to the portevin Le Chatelier effect based on dynamic strain aging (DSA), that is, the pinning effect of diffused solute atoms on dislocations [18,19,20].
Strain Rate Effect of Size Variants and Tensile Behavior The strain rate effect of size variants on tensile behavior of aluminum after deformation by ARB was investigated. The yield strength, ultimate strength and tensile toughness for size variants were all observed to increase with increase strain rates at different ranges for the size variants deformed by ARB.
THE EFFECT OF STRAIN RATE ON TENSILE PROPERTIES Effect of strain rate on tensile properties and fracture behavior is of critical importance to crash performance. There are two major issues for tensile testing at high strain rates Severe load oscillation deteriorates quality of stress-strain curve Existing strain measurement devices (strain gage, LVDT, or
Tensile properties were determined from these tests and mathematical relations were developed to represent tensile properties as a function of strain rate and temperature. For fatigue behavior, the effects considered include mold flow direction, mean stress, and temperature.(PDF) Effect of dynamic strain aging on the deformation Aug 01, 2015 · Effect of dynamic strain aging on the deformation and twinning behavior of a Mg-2Zn-2Nd alloy static and dynamic strain rates. Uniaxial tensile tests