Deformation behavior of cement treated demolition waste with recycled masonry and concrete subjected to drying and temperature change

2016 ◽  
Vol 68 ◽  
pp. 27-34 ◽  
Author(s):  
D.X. Xuan ◽  
A.A.A. Molenaar ◽  
L.J.M. Houben
Keyword(s):  
Temperature Change ◽  
Deformation Behavior ◽  
Demolition Waste ◽  
Recycled Masonry

scholarly journals Mixture optimization of cement treated demolition waste with recycled masonry and concrete

2011 ◽  
Vol 45 (1-2) ◽  
pp. 143-151 ◽  
Author(s):  
D. X. Xuan ◽  
L. J. M. Houben ◽  
A. A. A. Molenaar ◽  
Z. H. Shui
Keyword(s):  
Demolition Waste ◽  
Recycled Masonry

scholarly journals Enhancement of Uniform Elongation by Temperature Change during Tensile Deformation in a 0.2C TRIP Steel

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2053
Author(s):  
Noriyuki Tsuchida ◽  
Stefanus Harjo
Keyword(s):  
Tensile Test ◽  
Temperature Change ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Uniform Elongation ◽  
True Strain ◽  
High Strength ◽  
Tensile Tests ◽  
Transformation Rate ◽  
Trip Effect

It is important to control the deformation-induced martensitic transformation (DIMT) up to the latter part of the deformation to improve the uniform elongation (U.El) through the TRIP effect. In the present study, tensile tests with decreasing deformation temperatures were conducted to achieve continuous DIMT up to the latter part of the deformation. As a result, the U.El was improved by approximately 1.5 times compared with that in the tensile test conducted at 296 K. The enhancement of the U.El in the temperature change test was discussed with the use of neutron diffraction experiments. In the continuous DIMT behavior, a maximum transformation rate of about 0.4 was obtained at a true strain (ε) of 0.2, which was larger than that in the tensile test at 296 K. The tensile deformation behavior of ferrite (α), austenite (γ), and deformation-induced martensite (α′) phases were investigated from the viewpoint of the fraction weighted phase stress. The tensile test with a decreasing deformation temperature caused the increase of the fraction weighted phase stress of α and that of α′, which was affected by the DIMT behavior, resulting in the increase in the work hardening, and also controlled the ductility of α and α′, resulting in the enhancement of the U.El. Especially, the α phase contributed to maintaining high strength instead of α′ at a larger ε. Therefore, not only the DIMT behavior but also the deformation behavior of γ, α, and α′ are important in order to improve U.El due to the TRIP effect.

Thermo-Mechanical Behavior of MEMS Gyroscope Sensor Package Subjected to Temperature Change

2006 ◽  
Vol 324-325 ◽  
pp. 227-230
Author(s):  
Jin Won Joo ◽  
Yong Chul Cho ◽  
Jong Hwa Won ◽  
Sung Hoon Choa
Keyword(s):  
Mechanical Behavior ◽  
Frequency Shift ◽  
Temperature Change ◽  
Deformation Behavior ◽  
High Sensitivity ◽  
Temperature Dependent ◽  
Mems Gyroscope ◽  
Sensor Package ◽  
Gyroscope Sensor ◽  
Global And Local

In this paper, deformation behavior of the MEMS gyroscope package subjected to temperature change is investigated using a high-sensitivity moiré interferometry. Temperature dependent analyses of warpage and extension/contraction of the package are presented. Detailed global and local deformations of the package by temperature change are investigated and its effect on the frequency shift of the MEMS gyroscope is studied.

Plastic deformation of θ ' in Al-4%Cu alloy

1978 ◽  
Vol 36 (1) ◽  
pp. 576-577
Author(s):  
Shrikant P. Bhat
Keyword(s):  
Deformation Behavior ◽  
Room Temperature ◽  
Electron Microscopic Observation ◽  
Bulk Alloy ◽  
Electron Microscopic ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Orowan Mechanism ◽  
The Subject ◽  
Cyclic Straining

deformation behavior of Al-Cu alloys aged to contain θ ' has been the subject of many investigations (e.g., Ref. 1-5). Since θ ' is strong and hard, dislocations bypass θ ' plates (Orowan mechanism) at low strains. However, at high strains the partially coherent θ ' plates are probably sheared, although the mechanism is complex, depending on the form of deformation. Particularly, the cyclic straining of the bulk alloy is known to produce gross bends and twists of θ '. However, no detailed investigation of the deformation of θ ' has yet been reported; moreover, Calabrese and Laird interpreted the deformation of θ ' as largely being elastic.During an investigation of high temperature cyclic deformation, the detailed electron-microscopic observation revealed that, under reversed straining conditions, θ ' particles are severely distorted--bent and twisted depending on the local matrix constraint. A typical electronmicrograph, showing the twist is shown in Fig. 1. In order to establish whether the deformation is elastic or plastic, a sample from a specimen cycled at room temperature was heated inside the microscope and the results are presented in a series of micrographs (Fig. 2a-e).

Observation of secondary slip systems in tungsten bicrystals

1984 ◽  
Vol 42 ◽  
pp. 478-479
Author(s):  
J. R. Fekete ◽  
R. Gibala
Keyword(s):  
Stress Field ◽  
Grain Boundaries ◽  
Deformation Behavior ◽  
Stress Axis ◽  
Polycrystalline Materials ◽  
Slip Systems ◽  
Metallic Materials ◽  
Twist Boundary ◽  
Secondary Slip ◽  
Plane Normal

The deformation behavior of metallic materials is modified by the presence of grain boundaries. When polycrystalline materials are deformed, additional stresses over and above those externally imposed on the material are induced. These stresses result from the constraint of the grain boundaries on the deformation of incompatible grains. This incompatibility can be elastic or plastic in nature. One of the mechanisms by which these stresses can be relieved is the activation of secondary slip systems. Secondary slip systems have been shown to relieve elastic and plastic compatibility stresses. The deformation of tungsten bicrystals is interesting, due to the elastic isotropy of the material, which implies that the entire compatibility stress field will exist due to plastic incompatibility. The work described here shows TEM observations of the activation of secondary slip in tungsten bicrystals with a [110] twist boundary oriented with the plane normal parallel to the stress axis.

Transformation and Deformation Behavior in Sputter-Deposited Ti-Ni-Cu Thin Films

1995 ◽  
Vol 05 (C8) ◽  
pp. C8-689-C8-694 ◽  
Author(s):  
T. Hashinaga ◽  
S. Miyazaki ◽  
T. Ueki ◽  
H. Horikawa
Keyword(s):  
Thin Films ◽  
Deformation Behavior ◽  
Sputter Deposited
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