scholarly journals Modeling of Creep Deformation and Creep Fracture

2020 ◽  
Author(s):  
Qiang Xu ◽  
Zhongyu Lu
Keyword(s):  
Creep Deformation ◽  
Creep Fracture

Micro mechanics based on vacancy diffusion coupled with damage mechanics related to creep deformation and prediction of creep fracture life

2011 ◽  
Vol 28 (2) ◽  
pp. 126-136 ◽  
Author(s):  
A. Toshimitsu Yokobori ◽  
Kunihiko Abe ◽  
Hironori Tsukidate ◽  
Toshihito Ohmi ◽  
Ryuji Sugiura ◽  
...  
Keyword(s):  
Creep Deformation ◽  
Damage Mechanics ◽  
Vacancy Diffusion ◽  
Creep Fracture

Effects of Creep Deformation Model of Gr. 91 Steel at 600°C on Creep Fracture Mechanics Parameters

2017 ◽  
Author(s):  
Min-Gu Won ◽  
Nam-Su Huh ◽  
Hyeong-Yeon Lee ◽  
Woo-Gon Kim ◽  
Jae-Boong Choi
Keyword(s):  
Finite Element ◽  
Fracture Mechanics ◽  
Creep Deformation ◽  
Creep Model ◽  
Deformation Model ◽  
Secondary Creep ◽  
Creep Fracture ◽  
Reference Stress ◽  
Creep Region ◽  
Omega Model

The present paper investigates the effect of creep deformation model of Gr. 91 Steel at 600 °C on creep fracture mechanics parameters. Three types of creep deformation model were considered, i.e. Garofalo’s model and RCC-MRx model for primary-secondary creep region, and modified omega model for primary-secondary-tertiary creep region. The parameters for each creep deformation model were characterized from experiment results. Reference Stress (RS) method was used to estimate creep fracture mechanics parameters, C(t)-integral and COD rate for each creep model. Furthermore, elastic-creep finite element (FE) analyses were carried out to verify the results of RS method. Finally, the effect of creep deformation model was investigated by comparing the results of C(t)-integral and COD rate.

scholarly journals The Strain Rate Sensitivity and Creep Behavior for the Tripler Plane of Potassium Dihydrogen Phosphate Crystal by Nanoindentation

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 369
Author(s):  
Jianhui Mao ◽  
Wenjun Liu ◽  
Dongfang Li ◽  
Chenkai Zhang ◽  
Yi Ma
Keyword(s):  
Strain Rate ◽  
Strain Rate Sensitivity ◽  
Creep Deformation ◽  
Potassium Dihydrogen Phosphate ◽  
Rate Sensitivity ◽  
Dislocation Nucleation ◽  
Machining Process ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
Kdp Crystals

As an excellent multifunctional single crystal, potassium dihydrogen phosphate (KDP) is a well-known, difficult-to-process material for its soft-brittle and deliquescent nature. The surface mechanical properties are critical to the machining process; however, the characteristics of deformation behavior for KDP crystals have not been well studied. In this work, the strain rate effect on hardness was investigated on the mechanically polished tripler plane of a KDP crystal relying on nanoindentation technology. By increasing the strain rate from 0.001 to 0.1 s−1, hardness increased from 1.67 to 2.07 GPa. Hence, the strain rate sensitivity was determined as 0.053, and the activation volume of dislocation nucleation was 169 Å3. Based on the constant load-holding method, creep deformation was studied at various holding depths at room temperature. Under the spherical tip, creep deformation could be greatly enhanced with increasing holding depth, which was mainly due to the enlarged holding strain. Under the self-similar Berkovich indenter, creep strain could be reduced at a deeper location. Such an indentation size effect on creep deformation was firstly reported for KDP crystals. The strain rate sensitivity of the steady-state creep flow was estimated, and the creep mechanism was qualitatively discussed.

Phase-field simulation of nucleation and growth of M23C6 carbide and ferromagnetic phases during creep deformation in Type 304 steel

2010 ◽  
Vol 401 (1-3) ◽  
pp. 154-158 ◽  
Author(s):  
Yuhki Tsukada ◽  
Atsuhiro Shiraki ◽  
Yoshinori Murata ◽  
Shigeru Takaya ◽  
Toshiyuki Koyama ◽  
...  
Keyword(s):  
Creep Deformation ◽  
Phase Field ◽  
Nucleation And Growth ◽  
M23c6 Carbide ◽  
Phase Field Simulation ◽  
Field Simulation ◽  
Type 304

Creep deformation of stoichiometric uranium dioxide

1962 ◽  
Vol 7 (2) ◽  
pp. 133-141 ◽  
Author(s):  
W.M. Armstrong ◽  
W.R. Irvine ◽  
R.H. Martinson
Keyword(s):  
Uranium Dioxide ◽  
Creep Deformation

Finite element modelling of the creep deformation of T91 steel weldments at 600°C

1996 ◽  
Vol 67 (5) ◽  
pp. 215-220 ◽  
Author(s):  
Arun Kumar Bhaduri ◽  
Wolfgang Gaudig ◽  
Heinrich Theofel ◽  
Karl Maile
Keyword(s):  
Finite Element ◽  
Creep Deformation ◽  
Finite Element Modelling ◽  
Element Modelling

Creep Deformation of Polysynthetically Twinned (PST) Ti-48mol%Al

1999 ◽  
Vol 171-174 ◽  
pp. 709-716 ◽  
Author(s):  
G. Wegmann ◽  
T. Suda ◽  
Kouichi Maruyama
Keyword(s):  
Creep Deformation

Effect of prior treatment with potash on the creep deformation of magnesia refractories

Refractories ◽  
1986 ◽  
Vol 27 (5-6) ◽  
pp. 258-260
Author(s):  
I. I. Vishnevskii ◽  
R. E. Vol'fson ◽  
L. D. Smirnova ◽  
Yu. B. Sukhonos ◽  
I. F. Usatikov ◽  
...  
Keyword(s):  
Creep Deformation ◽  
Prior Treatment
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