High-temperature compressive deformation of β-SiAlON polycrystals containing minimum amount of intergranular glass phase

2008 ◽  
Vol 148 (1-3) ◽  
pp. 203-206 ◽  
Author(s):  
Kentarou Chihara ◽  
Daisuke Hiratsuka ◽  
Yutaka Shinoda ◽  
Takashi Akatsu ◽  
Fumihiro Wakai ◽  
...  
Keyword(s):  
High Temperature ◽  
Glass Phase ◽  
Compressive Deformation ◽  
Minimum Amount

HWD No. 3

Alloy Digest ◽  
1958 ◽  
Vol 7 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
High Temperature ◽  
Tensile Properties ◽  
Heat Treating ◽  
Minimum Amount ◽  
Temperature Performance ◽  
Aisi Type ◽  
Hot Work Steel

Abstract HWD No. 3 is an air-hardening hot work steel recommended for dies where a minimum amount of distortion during hardening is required. It is equivalent to AISI Type H13. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance as well as forming, heat treating, and joining. Filing Code: TS-72. Producer or source: Firth Sterling Inc..

Stress Relaxation of Sugi (Cryptomeria japonica D.Don) Wood in Radial Compression under High Temperature Steam

Holzforschung ◽  
1999 ◽  
Vol 53 (5) ◽  
pp. 541-546 ◽  
Author(s):  
W. Dwianto ◽  
T. Morooka ◽  
M. Norimoto ◽  
T. Kitajima
Keyword(s):  
High Temperature ◽  
Stress Relaxation ◽  
Cryptomeria Japonica ◽  
Chain Scission ◽  
Strain Recovery ◽  
Crystalline Lattice ◽  
Compressive Deformation ◽  
Radial Compression ◽  
Stress Strain ◽  
Permanent Fixation

Summary To clarify the mechanism of the permanent fixation of compressive deformation of wood by high temperature steaming, stress relaxation and stress-strain relationships in the radial compression for Sugi (Cryptomeria japonica D.Don) wood were measured under steam at temperatures up to 200°C. The stress relaxation curves above 100°C were quite different in shape from those below 100°C, showing a rapid decrease in stress with increasing temperature. In the stress-strain relationships measured above 140°C, the stress reduced as pre-steaming time increased when compared at the same strain. The recovery of compressive deformation (strain recovery) was decreased with steaming time and reached almost 0 in 10 min at 200°C. The relationship between the residual stress and the strain recovery at the end of relaxation measurements could be expressed by a single curve regardless of time and temperature. The permanent fixation of deformation by steaming below 200°C was considered to be due to chain scission of hemicelluloses accompanying a slight cleavage of lignin. In some cases, the increase in regularity of the crystalline lattice space of microfibrils or the formation of crosslinks between the cell wall polymers seemed to play an important role in the permanent fixation of compressive deformation.

Evidence of a high-temperature dipole-glass phase inK2CrO4

1986 ◽  
Vol 33 (3) ◽  
pp. 1871-1874 ◽  
Author(s):  
S. D. Russell ◽  
R. Merlin
Keyword(s):  
High Temperature ◽  
Glass Phase ◽  
Dipole Glass

scholarly journals The role of nitrogen in the intergranular glass phase of Si3N4 on high temperature applications and wear

1993 ◽  
Vol 168 (1) ◽  
pp. 55-59 ◽  
Author(s):  
R.F. Silva ◽  
A.P. Moreira ◽  
J.M. Gomes ◽  
A.S. Miranda ◽  
J.M. Vieira
Keyword(s):  
High Temperature ◽  
Glass Phase ◽  
Temperature Applications

Comparison of High-Temperature Compressive Deformation Characteristics of Differently Processed LY12 Aluminum Alloys

2010 ◽  
Vol 667-669 ◽  
pp. 845-849
Author(s):  
Yao Wang ◽  
Qing Wei Jiang ◽  
Ying Wu ◽  
Xiao Wu Li
Keyword(s):  
High Temperature ◽  
Surface Deformation ◽  
Testing Temperature ◽  
Al Alloys ◽  
Compressive Deformation ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Al Alloy ◽  
Damage Characteristics ◽  
Angular Pressing

The individual or joint effects of annealing and equal channel angular pressing (ECAP) treatments on the high-temperature compressive deformation and damage behavior of cast LY12 Al alloys were studied. The compressive deformation behavior and surface deformation and damage characteristics of differently treated LY12 Al alloy samples were examined at temperatures ranging from 25°C to 400°C. It is found that the LY12 Al alloy exhibits different compressive mechanical behavior depending on different treatments, and the compressive deformation and damage characteristics of LY12 Al alloys with different microstructural states are closely related with the testing temperature. As compared to other samples (e.g. as-cast, annealed, as-cast+2ECAPed), the sample annealed at 450°C for 3h followed by ECAPed for 2 passages (i.e. annealed+2ECAPed) shows a better high-temperature deformation stability.

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