1-20 of 94 Search Results for

high strain rate torsion testing

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009012
EISBN: 978-1-62708-185-6
... rotating flywheel acting through a cam, which produces strain rates as high as 500 s −1 . Cam plastometers are expensive and also have the disadvantage that the working limits of the material are not measured. Hot torsion testing involves subjecting a dog-bone-shaped specimen to torsion on a machine that...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009011
EISBN: 978-1-62708-185-6
...) test temperature, but also the temperature history during the test. Fig. 8 Stress-strain curves for solid torsion specimens of 3.3% Si steel showing effect of gage-length-to-diameter ratio ( L / d ) on flow stress at high strain rates when adiabatic heating occurs. The flow curves are in terms of...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009009
EISBN: 978-1-62708-185-6
... carried out in a servohydraulic machine such as that shown schematically in Fig. 1 . Because strain-rate effects are large in high-temperature testing, it is important to use an apparatus with high machine stiffness. The furnace that surrounds the specimen is usually of resistance, radiant-heating, or...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003243
EISBN: 978-1-62708-199-3
... of steels (particularly weldments) to hydrogen embrittlement. The threshold obtained by this method will be somewhat high, as test duration at each load is short. Fig. 18 Typical load-time record for four-point rising step-load test To index susceptibility to hydrogen-assisted cracking...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009007
EISBN: 978-1-62708-185-6
...-Tension Testing.” In the torsion test, deformation is caused by pure shear, and large strains can be achieved without the limitations imposed by necking ( Ref 2 , 3 ). Because the strain rate is proportional to rotational speed, high strain rates are readily obtained ( Table 1 ). Moreover, friction has...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003241
EISBN: 978-1-62708-199-3
... the need for extrapolation, but they are not as durable as analog testers. In statistical process control of Brinell testing, there is no adequate way to achieve high process capability indices (C p and C pk values) without making the investment in state of the art optics that utilize frame...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... the low strain rates found in creep, but is not a frequent occurrence at the faster strain rates in deformation processes unless there are brittle precipitates at the grain boundaries. This is because the probability of wedge cracking varies with the applied strain rate. If the strain rate is so high...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003057
EISBN: 978-1-62708-200-6
.... The article describes testing methods such as room and high-temperature strength test methods, proof testing, fracture toughness measurement, and hardness and wear testing. It also explains methods for determining thermal expansion, thermal conductivity, heat capacity, and emissivity of ceramics and...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.9781627081764
EISBN: 978-1-62708-176-4
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003044
EISBN: 978-1-62708-200-6
.... Selection of test methods used to determine the mechanical properties of composite materials must take environmental factors into account, since exposure to any environment affects these properties. Early in the development of high-performance carbon fiber composites, it was discovered that merely leaving...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006761
EISBN: 978-1-62708-295-2
... this article is on the various types of static load testing, hardness testing, and impact testing. Other specialized testing, such as wear testing, dynamic (high-strain-rate) testing, elevated-temperature creep/stress rupture, residual stress, fracture mechanics, and fatigue testing, are potentially...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005413
EISBN: 978-1-62708-196-2
..., triggers slip on secondary systems. The contribution to the strain by secondary dislocations is negligibly small; however, since they will entangle with primary dislocations, they have a strong catalytic effect on the storage rate of dislocations and cause the high hardening coefficient in stage II. As...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000608
EISBN: 978-1-62708-181-8
... in these views is typical of those produced by high-cycle fatigue in combined bending and torsion. Fig. 345 : 2×. Fig. 346 : 10× Fig. 347 Fatigue fracture along prior-austenite grain boundaries in as-quenched AISI 4140. Note striations (arrows) at places where the crack met grain-boundary...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009003
EISBN: 978-1-62708-185-6
... the low strain rates found in creep but is not a frequent occurrence at the faster strain rates in deformation processes unless there are brittle precipitates at the grain boundaries. This is because the probability of wedge cracking varies with the applied strain rate. If the strain rate is so high...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001831
EISBN: 978-1-62708-181-8
.... Transgranular creep ruptures, which generally result from high applied stresses (high strain rates), fail by a void-forming process similar to that of microvoid coalescence in dimple rupture ( Ref 45 , 46 , 47 ). Because transgranular creep ruptures show no decohesive character, they will not be considered...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003108
EISBN: 978-1-62708-199-3
... production of other cast irons. Frequent chemical, mechanical, and metallurgical testing is needed to ensure that the required quality is maintained and that specifications are met. Manufacture of high-quality ductile iron begins with careful selection of charge materials that will yield a relatively...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... often exhibit river patterns, further confirming transgranular cleavage as the mechanism of crack propagation. River-mark features on individual facets can also be used to determine local crack propagation direction. Cleavage occurs in materials with a high strain-hardening rate and relatively low...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005403
EISBN: 978-1-62708-196-2
...), produced by equal channel angular extrusion (ECAE) ( Ref 3 ), high pressure torsion (HPT) ( Ref 4 ), or merely large strain torsion testing ( Ref 5 ). Ultrafine grain strucutres can be obtained in this way. When dynamic recovery is weak, local concentrations of dislocations lead to various types of...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000610
EISBN: 978-1-62708-181-8
... candy fracture, cleavage fracture, brittle fracture, high-cycle fatigue fracture, fatigue striations, hydrogen-embrittlement failure, creep crack propagation, fatigue crack nucleation, intergranular creep fracture, torsional overload fracture, stress-corrosion cracking, and grain-boundary damage of...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... argument that twinning initiates at the yield stress with no further increase in the number of twins. Note that this is different from twinning initiated due to high strain-rate deformation at room temperature, where plastic strain must usually accumulate by slip prior to the onset of twinning...