P-27 Characteristics of Cavity Variation followed by Time Fraction at Creep Rupture Test

2007 ◽  
Vol 2007.6 (0) ◽  
pp. _P-27-1_-_P-27-3_
Author(s):  
ChanSeo Jeong ◽  
ByeongSoo Lim
Keyword(s):  
Creep Rupture ◽  
Creep Rupture Test

Study on Creep Rupture Test

1960 ◽  
Vol 46 (9) ◽  
pp. 982-987
Author(s):  
Ryuichi Nakagawa ◽  
Yasuo Otoguro
Keyword(s):  
Creep Rupture ◽  
Creep Rupture Test

MECHANICAL PROPERTIES OF SQUEEZE INFILTRATED AS52 MAGNESIUM MATRIX COMPOSITES

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1510-1515 ◽  
Author(s):  
YONG-HA PARK ◽  
YONG-HO PARK ◽  
IK-MIN PARK ◽  
KYUNG-MOX CHO ◽  
JEONG-JUNG OAK ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Creep Rupture ◽  
Matrix Composites ◽  
Matrix Interface ◽  
Magnesium Matrix ◽  
Magnesium Matrix Composites ◽  
Squeeze Infiltration ◽  
Polygonal Shape ◽  
Creep Rupture Test ◽  
Infiltration Method

Aluminum borate whisker (9( Al 2 O 3)·( B 2 O 3)) reinforced AS52(with and without strontium modification) metal matrix composites (MMC) were fabricated by the squeeze infiltration method. Creep rupture test was carried out at 150°C and 100 MPa condition. Results showed that Alborex reinforcement and modified polygonal shape Mg 2 Si phase contributed to the enhancement of mechanical properties and creep resistance. Creep rupture time was increased 11% and minimum creep rate was decreased 17% in the composite. At the Alborex/matrix interface, uniform thin layer of MgO was formed. The initiation of micro-voids at the reinforcement/matrix or Mg 2 Si /matrix interface was followed by their growth and coalescence to macro-cracks.

scholarly journals Assessment of remaining life of fossil power plant parts by means of a miniature creep rupture test.

1990 ◽  
Vol 30 (10) ◽  
pp. 854-861 ◽  
Author(s):  
Yoshikuni Kadoya ◽  
Toru Goto ◽  
Shingo Date ◽  
Takayoshi Yamauchi ◽  
Tomikane Saida ◽  
...  
Keyword(s):  
Power Plant ◽  
Creep Rupture ◽  
Remaining Life ◽  
Plant Parts ◽  
Creep Rupture Test ◽  
Fossil Power Plant

scholarly journals Microstructural Evolution of X20CrMoV12.1 Steel upon Short-term Creep Rupture Test

2013 ◽  
Vol 43 (4) ◽  
pp. 164-172 ◽  
Author(s):  
Mariko Hino ◽  
Yinsheng He ◽  
Kejian Li ◽  
Jungchel Chang ◽  
Keesam Shin
Keyword(s):  
Microstructural Evolution ◽  
Creep Rupture ◽  
Short Term ◽  
Creep Rupture Test ◽  
Term Creep ◽  
Short Term Creep

Brittle and Ductile Creep Rupture Life Prediction of 1CrMoV Steel Notched Thick Plates

1990 ◽  
Vol 112 (3) ◽  
pp. 225-232 ◽  
Author(s):  
K. Ando ◽  
Y. Takeda ◽  
K. Takezoe
Keyword(s):  
Crack Initiation ◽  
Damage Mechanics ◽  
Notch Root ◽  
Rupture Life ◽  
Prediction Method ◽  
Creep Rupture ◽  
Material Behavior ◽  
Analytical Prediction ◽  
Crack Initiation Life ◽  
Creep Rupture Test

An analytical prediction method of brittle and ductile creep rupture life of 1CrMoV steel notched thick plate is proposed. Rupture time is evaluated as a sum of crack initiation life ti and crack growth life tp. In the case of ductile creep at high stresses, ti is evaluated by the creep deformation criteria. In addition, in the case of brittle creep at low stresses, ti is evaluated by Kachanov’s damage mechanics theory. Materials constants in Kachanov’s theory can be determined by the relatively short-term creep rupture test of notched specimen, etc., according to the present method. Creep rupture test, interrupted creep test, and micro-structural observation, have been used, which can explain the variety of material behavior, i.e., notch weakening at low stresses and notch strengthening at high stresses. In addition, in this analysis the analytically estimated creep crack initiation life corresponds to the time to creep void initiation just inside the notch root.

A Study on the Creep Rupture Life Estimation of Internally Pressurized Welded Pipe Joints

2006 ◽  
Author(s):  
Tetsuo Teramae
Keyword(s):  
Crack Growth ◽  
Welded Joint ◽  
Rupture Life ◽  
Creep Rupture ◽  
Coarse Grained ◽  
Experimental Result ◽  
Fine Grained ◽  
Pipe Joints ◽  
Creep Rupture Test ◽  
Welded Pipe

A study had been conducted to establish the precise method estimating the creep rupture life of welded steam pipe joints used for thermal power plants. Firstly, basic creep data of 2.25CrlMo low alloy steel, such as rupture time, minimum creep strain rate, and creep crack growth rate, had been obtained on mother material, fine-grained heat affected zone (HAZ), coarse-grained HAZ, and weld metal. Secondly, internally pressurized creep rupture test had been conducted on the pipe specimens of mother material, seam welded joint and girth welded joint. Whereas girth welded pipe joints showed longer lives than those of mother material pipes, seam welded pipe joints showed shorter rupture lives. To clarify the effect of fine-grained HAZ on the rupture life of the seam welded pipe joint, an analytical study had been performed taking the difference of creep deformation between fine-grained HAZ and mother material into account. The analytical creep rupture life had agreed quite well with experimental one. Finally, internally pressurized creep rupture test had been conducted on the specimens of the seam welded pipe joints with a semi-elliptical notch introduced along the outer HAZ of weld line. Creep rupture life of these specimens was calculated as the sum of crack incubation time and crack growth time. It was shown that the calculated creep rupture life had agreed quite well with the experimental result.

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