The orientation dependence of deformation mode and structure in stoichiometric NiAl single crystals deformed by high temperature steady-state creep

1973 ◽  
Vol 4 (1) ◽  
pp. 159-166 ◽  
Author(s):  
J. Bevk ◽  
R. A. Dodd ◽  
P. R. Strutt
Keyword(s):  
Steady State ◽  
High Temperature ◽  
Single Crystals ◽  
Deformation Mode ◽  
Orientation Dependence ◽  
Steady State Creep

Features of the subboundary structure in deformed molybdenum single crystals

1978 ◽  
Vol 36 (1) ◽  
pp. 316-317
Author(s):  
M.M. Myshlyaev ◽  
I.I. Khodos ◽  
O.N. Senkov ◽  
Yu.A. Romanov
Keyword(s):  
Steady State ◽  
High Temperature ◽  
Single Crystals ◽  
Dislocation Line ◽  
Regular Structure ◽  
Steady State Creep ◽  
Burgers Vector

The subboundary structure corresponding to the high temperature steady-state creep of molybdenum single crystals is formed by both regular sites of dislocation nets and walls, various in structure and composition, (the nets are formed by two, three, five and six dislocation sets having different values of the angles between the Burgers vector Ḇ and the dislocation line ū ; the walls are formed by one, two and three sets of edge and mixed dislocations; the Burgers vectors of the dislocations are I/2 <III> and, <I00>) and by the sites of a more complex and less regular structure. Several of these are considered below.Fig.I represents a subboundary formed by five dislocation sets.Its regular sites (nets) can be formed by means of interaction of dislocations I and 4 with dislocations 2 (fig.2a). In several irregular sites (fig.I and 2b) no dislocations 2 are seen to be present, and neither dislocations 3 and 5 arisen from the reactions of dislocations 2 with dislocations I and 4.

Study on Thermal Cycling of Sn0.7Cu Solder

2013 ◽  
Vol 791-793 ◽  
pp. 362-365
Author(s):  
Li Yang ◽  
Ju Li Li ◽  
Jing Guo Ge ◽  
Meng Li ◽  
Nan Ji
Keyword(s):  
Shear Stress ◽  
Steady State ◽  
High Temperature ◽  
Thermal Cycling ◽  
Shear Strain ◽  
Maximum Shear Stress ◽  
Steady State Creep ◽  
Maximum Shear Strain ◽  
Cycle Number ◽  
State Cycle

Thermal cycling of a unit Sn0.7Cu solder was studied based on the steady-state creep constitutive equation and Matlab software. The results show that there is a steady-state cycle for the thermal cycling of unit Sn0.7Cu eutectic solder. In steady-state thermal cycling, the shear stress is increased with the increase of temperature. There is a stage of stress relaxation during high temperature. A liner relationship between maximum shear stress and maximum shear strain is observed during thermal cycling. The metastable cycle number is declined greatly with the increase of maximum shear strain.

scholarly journals The orientation dependence of the strength of ice single crystals

2000 ◽  
Vol 46 (152) ◽  
pp. 41-44 ◽  
Author(s):  
Y. L. Trickett ◽  
I. Baker ◽  
P. M. S. Pradhan
Keyword(s):  
Strain Rate ◽  
Single Crystals ◽  
Axial Strain ◽  
Constant Strain Rate ◽  
Peak Stress ◽  
Deformation Mode ◽  
Orientation Dependence ◽  
Compression Tests ◽  
Ice Flow ◽  
Critical Resolved Shear Stress

AbstractSingle crystals with a wide variety of orientations were cut from large pucks of laboratory-grown ice. Constant-strain-rate compression tests were performed on the crystals either at an axial strain rate of 1 × 10−5 s−1at –20°C or at axial strain rates from 1 × 10−6 s−1 to 1 × 10−4 s−1 at –10°C. In agreement with previous studies of ice flow, the compression tests showed a linearly rising stress with increasing strain, followed by a sharply declining stress after reaching a peak. With further strain, the sharp decline in stress slowed and the flow stress approached a plateau that was only weakly dependent on strain. For all crystallographic orientations, it was found that Schmid’s (critical resolved shear stress) law was obeyed by the peak stress. Slip lines clearly showed that basal slip was the deformation mode.

Reduction in steady-state creep rates by aluminum-doping in zinc single crystals

1982 ◽  
Vol 16 (5) ◽  
pp. 551-554 ◽  
Author(s):  
K. Maruyama ◽  
S. Karashima ◽  
H. Oikawa ◽  
T. Sato
Keyword(s):  
Steady State ◽  
Single Crystals ◽  
Steady State Creep ◽  
Aluminum Doping

High-Temperature Steady-State Creep in Rutile

1963 ◽  
Vol 46 (9) ◽  
pp. 411-417 ◽  
Author(s):  
WALTER M. HIRTHE ◽  
JOHN O. BRlTTAIN
Keyword(s):  
Steady State ◽  
High Temperature ◽  
Steady State Creep

The Investigation of Creep Behavior for NiAl-28Cr-5.5Mo-0.5Hf-0.02wt.%P Alloy at High Temperature

2011 ◽  
Vol 279 ◽  
pp. 28-32
Author(s):  
Guang Ye Zhang ◽  
Dong Wen Ye ◽  
Jin Lin Wang ◽  
You Ming Chen ◽  
Long Fei Liu ◽  
...  
Keyword(s):  
Steady State ◽  
High Temperature ◽  
Creep Behavior ◽  
Fracture Behavior ◽  
Primary Creep ◽  
Dislocation Climb ◽  
Steady State Creep ◽  
Creep Fracture ◽  
Creep Mechanisms ◽  
Higher Temperature

The Microstructure and creep behavior for NiAl-28Cr-5.5Mo-0.5Hf-0.02wt.%P alloy at high temperature have been investigated in this paper. The results reveal that the high temperature creep behavior of the NiAl-28Cr-5.5Mo-0.5Hf-0.02wt.%P alloy is characterized by transient primary creep and dominant steady-state creep as well as ternary creep behavior. The primary creep can be described by Garofalo equation and the steady-state creep can be depicted by Dorn equation. The creep mechanisms are viscous glide of dislocations at lower and middle testing temperatures and dislocation climb at higher temperature. No change of the microstructure for the testing alloy indicates that the creep fracture is controlled by the formation and propagation of cavities and cracks, and the creep fracture behavior obeys Monk man-Grant relationship.

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