Evaluation of thermal aging embrittlement of austenitic stainless steels JN1, JJ1, and JK2 by cryogenic small-punch testing

2002 ◽  
Vol 17 (4) ◽  
pp. 852-860 ◽  
Author(s):  
Maribel L. Saucedo-Muñoz ◽  
Shi Cheng Liu ◽  
Shin-Ichi Komazaki ◽  
Il-Hyun Kwon ◽  
Toshiyuki Hashida ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Volume Fraction ◽  
Austenitic Stainless Steels ◽  
Sem Analysis ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test ◽  
Solution Treated ◽  
Intergranular Brittle Fracture ◽  
The Difference

Small-punch tests were conducted at 4, 77, and 293 K on three newly developed cryogenic austenitic stainless steels, JN1, JJ1, and JK2, which were solution treated, water-quenched, and then aged at 923, 973, 1023, and 1073 K for 5 h. Small-punch test energy was employed for the evaluation of the aging-induced embrittlement behavior in these materials. An SEM analysis of the fracture surface for the solution-treated steel specimens indicated a ductile fracture, having the highest SP test energy values. On the contrary, intergranular brittle fracture was observed in aged specimens. The small-punch test energy of materials decreased significantly as the aging process progressed. The highest and lowest decrease in small-punch test energy with aging temperature occurred in JN1 and JK2 steels, respectively. The decrease in small-punch test energy was shown to follow appropriately the aging-induced embrittlement in these materials. The difference in aging-induced embrittlement behavior for these steels was explained on the basis of the volume fraction of intergranular precipitates in aged samples.

Investigation of the Hydrogen Embrittlement on the 65Mn Steel from the Nuclear Power Plant with Small Punch Method

2010 ◽  
Vol 118-120 ◽  
pp. 206-210
Author(s):  
Zhao Xi Wang ◽  
Hui Ji Shi ◽  
Guo Dong Zhang ◽  
Bao Ping Qu ◽  
Jian Lu ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Room Temperature ◽  
Fracture Strain ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test ◽  
Charging Time ◽  
Intergranular Brittle Fracture ◽  
Charging Current ◽  
Total Impact

Damage of metals due to the influence of hydrogen is quite frequent and leads to dangerous failures. The characteristics of the hydrogen embrittlemnt of the 65Mn steel were evaluated with small punch test. With the increment of the amount of the hydrogen absorbed into the alloy at room temperature, the strength and the toughness of the material reduce. From the small punch experimental results, it is found the total impact energy, the fracture strain and the fracture stress decrease with the increment of the cathodic hydrogen charging time. The fracture surfaces change from the typical ductile fracture with big voids to the typical intergranular brittle fracture mode after hydrogen absorbed in the specimens with higher charging current density.

Prüfung duktiler Werkstoffe mit dem Small-Punch-Test

2005 ◽  
Vol 47 (1-2) ◽  
pp. 45-54 ◽  
Author(s):  
Meinhard Kuna ◽  
Martin Abendroth
Keyword(s):  
Small Punch Test ◽  
Small Punch ◽  
Punch Test

Predicting ductile fracture of cracked pipes using small punch test data

2021 ◽  
Vol 87 ◽  
pp. 104211
Author(s):  
Jong-Min Lee ◽  
Jin-Ha Hwang ◽  
Yun-Jae Kim ◽  
Jin-Weon Kim
Keyword(s):  
Ductile Fracture ◽  
Test Data ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test

Estimating damage parameters of a CuCrZr alloy subjected to two varying heat treatments using small punch test

2021 ◽  
Vol 557 ◽  
pp. 153263
Author(s):  
V.D. Vijayanand ◽  
M. Mokhtarishirazabad ◽  
Y. Wang ◽  
M. Gorley ◽  
D.M. Knowles ◽  
...  
Keyword(s):  
Heat Treatments ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test

Development of Impact Small Punch Test for Investigating Energy Absorption

2021 ◽  
pp. 106675
Author(s):  
Bo Cao ◽  
Shiguma Yoshida ◽  
Takeshi Iwamoto ◽  
Hang Thi Pham
Keyword(s):  
Energy Absorption ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test
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