Creep property measurement of service-exposed SUS 316 austenitic stainless steel by the small-punch creep-testing technique

2002 ◽  
Vol 17 (8) ◽  
pp. 1945-1953 ◽  
Author(s):  
Maribel L. Saucedo-Muñoz ◽  
Shin-Ichi Komazaki ◽  
Toru Takahashi ◽  
Toshiyuki Hashida ◽  
Tetsuo Shoji
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Creep Test ◽  
Creep Resistance ◽  
Creep Property ◽  
Creep Rupture ◽  
Secondary Creep ◽  
Small Punch ◽  
Uniaxial Creep ◽  
Small Punch Creep Test

The creep properties for SUS 316 HTB austenitic stainless steel were evaluated by using the small-punch creep test at 650 °C for loads of 234, 286, 338, 408, and 478 N and at 700 °C for loads of 199 and 234 N. The creep curves, determined by means of the small-punch creep test, were similar to those obtained from a conventional uniaxial creep test. That is, they exhibited clearly the three creep stages. The width of secondary creep stage and rupture time tr decreased with the increase in testing load level. The creep rupture strength for the service-exposed material was lower than that of the as-received material at high testing loads. However, the creep resistance behavior was opposite at relatively low load levels. This difference in creep resistance was explained on the basis of the difference in the creep deformation and microstructural evolution during tests. It was also found that the ratio between the load of small-punch creep test and the stress of uniaxial creep test was about 1 for having the same value of creep rupture life.

Small Punch Creep Test In A 316 Austenitic Stainless Steel

2016 ◽  
pp. 507-514
Author(s):  
Maribel L. Saucedo-Muñoz ◽  
Ken-Ichi Komazaki ◽  
Arturo Ortiz-Mariscal ◽  
Victor M. Lopez-Hirata
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Creep Test ◽  
Small Punch ◽  
Small Punch Creep Test

scholarly journals Small punch creep test in a 316 austenitic stainless steel

2015 ◽  
Vol 51 (1) ◽  
pp. e034 ◽  
Author(s):  
Maribel L. Saucedo-Muñoz ◽  
Shi-Ichi Komazaki ◽  
Toshiyuki Hashida ◽  
Víctor M. López-Hirata
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Creep Test ◽  
Small Punch ◽  
Small Punch Creep Test

Small Punch Creep Test in a 316 Austenitic Stainless Steel

2016 ◽  
pp. 507-514
Author(s):  
Maribel L. Saucedo-Muñoz ◽  
Ken-Icbi Komazaki ◽  
Arturo Ortiz-Mariscal ◽  
Victor M. Lopez-Hirata
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Creep Test ◽  
Small Punch ◽  
Small Punch Creep Test

Small Punch Creep Properties of Heat Affected Zones of Reduced Activation Ferritic Steel

2008 ◽  
Author(s):  
Taichiro Kato ◽  
Shin-Ichi Komazaki ◽  
Yutaka Kohno ◽  
Hiroyasu Tanigawa
Keyword(s):  
Base Metal ◽  
Creep Test ◽  
Ferritic Steel ◽  
Electron Beam Welding ◽  
High Stress ◽  
Creep Rupture ◽  
Creep Tests ◽  
Creep Properties ◽  
Small Punch ◽  
Uniaxial Creep

The small punch (SP) creep test was carried out at the temperatures of 823∼923 K by using a further miniaturized specimen, namely, TEM disk-type specimen (φ 3.0×t0.25 mm). The tests were applied to the fine grain heat affected zone (FGHAZ), tempered HAZ (THAZ) and base metal (BM), respectively, which were removed from the joint of the reduced activation ferritic steel welded by an electron beam welding, in order to investigate the creep properties of such local regimes. The results obtained from the SP creep test were correlated with those of uniaxial creep tests using the base metal (BM) and welded joint (WJ). Experimental results revealed that there were no large differences between the SP creep rupture strengths of the FGHAZ and THAZ and that of the BM at the relatively high load levels. This result was in good agreement with the fact that the uniaxial creep strength of the WJ was almost coincident with that of the BM at the relatively high stress levels. In addition, the ratio of load (P) to stress (σ), which gave same rupture time, was calculated by using the creep rupture data of the BMs. As a result, the ratio was determined to be 0.43, resulting in the following equation; P = 0.43 σ.

Assessment of Heat-to-Heat Variation of Gr.91 Boiler Pipings by Small Punch Creep Test

2018 ◽  
Author(s):  
Shin-ichi Komazaki ◽  
Keisuke Obata ◽  
Masato Tomobe ◽  
Masatsugu Yaguchi ◽  
Akihiro Kumada
Keyword(s):  
Creep Test ◽  
Power Plants ◽  
Rupture Strength ◽  
Rupture Life ◽  
Creep Property ◽  
Type Specimen ◽  
Testing Technique ◽  
Small Disk ◽  
Small Punch ◽  
Uniaxial Creep

The small punch (SP) testing technique was applied to five heats of Gr.91 steel, which had been actually used for boiler pipings in different ultra-super critical (USC) power plants for long periods of time, to investigate the applicability of this testing technique to the assessment of heat-to-heat variation of creep property. The SP creep test was carried out at the temperature of 650°C and under the loads of 190, 230, 300 N using a small disk-type specimen (ϕ 8 × 0.5 mm). The experimental results revealed that the SP creep rupture strength (rupture life) and the deformation rate were different depending on the heat. These differences were qualitatively in good agreement with those observed in the uniaxial creep test. The results obtained in this study indicated that the SP creep testing technique could be a strong tool for the assessment of heat-to-heat variation of in-service boiler pipings.

On Time-Temperature Parameters for Correlation of Creep-Rupture Data in Stainless Steel Weldments

1978 ◽  
Vol 100 (3) ◽  
pp. 319-332 ◽  
Author(s):  
W. E. White ◽  
Iain Le May
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Creep Rate ◽  
Creep Rupture ◽  
Rupture Time ◽  
Function Approach ◽  
Secondary Creep ◽  
Rupture Data ◽  
The Relationship ◽  
Secondary Creep Rate

The Manson-Haferd, Larson-Miller, and Orr-Sherby-Dorn time-temperature parameters were applied to creep-rupture data obtained from testing two batches of austenitic stainless steel weldments. It was found that none of these correlated the data satisfactorily. A new parameter, based on a modification of one proposed originally by Manson and by Goldhoff and Sherby, was found to adequately correlate the data. The Minimum-Commitment, Station-Function Approach of Manson and Ensign was also applied, the results of which supported those obtained from the analysis made using the parameters listed above. Finally, from the relationship between rupture-time and secondary creep-rate, it is suggested that the form of the rupture data may be useful in predicting the physical basis for creep.

Creep Property Evaluation of Heat-Resistant Steels by Small Punch Creep Test

2007 ◽  
Vol 539-543 ◽  
pp. 4434-4439 ◽  
Author(s):  
Shinichi Komazaki ◽  
T. Nakata ◽  
Takayuki Sugimoto ◽  
Yutaka Kohno
Keyword(s):  
Creep Test ◽  
Ferritic Steel ◽  
Rupture Strength ◽  
Creep Property ◽  
Type Specimen ◽  
Standard Test ◽  
Creep Rupture ◽  
Ferritic Steels ◽  
Small Punch ◽  
Property Evaluation

The recently developed small punch (SP) creep test was applied to four different heatresistant ferritic steels, namely, two kinds of conventional ferritic steels which had been actually used in the high-temperature components for long periods and two advanced high chromium ferritic steels for fusion reactor materials to investigate the applicability of the SP creep test. The ratio of the load of SP creep test to the stress of standard uniaxial creep test was calculated so that both the creep rupture curves (load/stress versus Larson-Miller parameter curves) were overlapped to convert the results of SP creep test into those of standard test. As a result, the ratio was determined to be 2.4, irrespective of the kind of ferritic steel. This result indicates that the creep rupture strength of heat-resistance ferritic steels can be estimated using a miniaturized plate-type specimen and this conversion coefficient 2.4 independent of the kind of ferritic steel.

Evaluating of creep property of distinct zones in P92 steel welded joint by small punch creep test

2013 ◽  
Vol 47 ◽  
pp. 677-686 ◽  
Author(s):  
Lei Zhao ◽  
Hongyang Jing ◽  
Lianyong Xu ◽  
Yongdian Han ◽  
Junjie Xiu ◽  
...  
Keyword(s):  
Creep Test ◽  
Welded Joint ◽  
Creep Property ◽  
P92 Steel ◽  
Small Punch ◽  
Small Punch Creep Test
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