scholarly journals Absorbed Energy Distribution of Ductile Ni-resist Alloyed Iron Under Instrumented Impact Load at Low Temperatures

2016 ◽  
Vol 56 (7) ◽  
pp. 1285-1288
Author(s):  
Jiang Ke ◽  
Qu Yingdong ◽  
You Junhua ◽  
Li Rongde
Keyword(s):  
Energy Distribution ◽  
Low Temperatures ◽  
Impact Load ◽  
Absorbed Energy ◽  
Alloyed Iron

Absorbed energy distribution in heterogeneous semiconductor structures

1983 ◽  
Vol 78 (2) ◽  
pp. K131-K135
Author(s):  
A. F. Akkerman ◽  
A. L. Gibrekhterman ◽  
A. V. Dvurechenskii
Keyword(s):  
Energy Distribution ◽  
Absorbed Energy ◽  
Semiconductor Structures

scholarly journals Charpy Impact Properties of Hydrogen-Exposed 316L Stainless Steel at Ambient and Cryogenic Temperatures

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 625 ◽  
Author(s):  
Le Thanh Hung Nguyen ◽  
Jae-Sik Hwang ◽  
Myung-Sung Kim ◽  
Jeong-Hyeon Kim ◽  
Seul-Kee Kim ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Low Temperatures ◽  
316L Stainless Steel ◽  
Charpy Impact ◽  
Cryogenic Temperatures ◽  
Absorbed Energy ◽  
Impact Properties ◽  
Charging Time ◽  
The Impact

316L stainless steel is a promising material candidate for a hydrogen containment system. However, when in contact with hydrogen, the material could be degraded by hydrogen embrittlement (HE). Moreover, the mechanism and the effect of HE on 316L stainless steel have not been clearly studied. This study investigated the effect of hydrogen exposure on the impact toughness of 316L stainless steel to understand the relation between hydrogen charging time and fracture toughness at ambient and cryogenic temperatures. In this study, 316L stainless steel specimens were exposed to hydrogen in different durations. Charpy V-notch (CVN) impact tests were conducted at ambient and low temperatures to study the effect of HE on the impact properties and fracture toughness of 316L stainless steel under the tested temperatures. Hydrogen analysis and scanning electron microscopy (SEM) were conducted to find the effect of charging time on the hydrogen concentration and surface morphology, respectively. The result indicated that exposure to hydrogen decreased the absorbed energy and ductility of 316L stainless steel at all tested temperatures but not much difference was found among the pre-charging times. Another academic insight is that low temperatures diminished the absorbed energy by lowering the ductility of 316L stainless steel.

Ductile-Brittle Transition Behaviors with Two Striker Geometries in the Instrumented Charpy Impact Test

2004 ◽  
Vol 449-452 ◽  
pp. 861-864 ◽  
Author(s):  
Shigeki Morita ◽  
Toshiro Kobayashi
Keyword(s):  
Impact Test ◽  
Impact Load ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Test Method ◽  
Absorbed Energy ◽  
Time Curve ◽  
Edge Geometry ◽  
Standard Procedures ◽  
High Level

Instrumented Charpy impact test method is possible to obtain various dynamic fracture characteristics from the load-deflection or load-time curve. Recently, instrumented Charpy impact test method is widely used for the evaluation of toughness of various specimens of different materials with different sizes. It is important to record an accurate impact load in order to improve the reliability of this test method. In some standards of instrumented Charpy impact test method such as ISO and ASTM, they haven.t clearly standardized striker geometry which seem to directly influence the obtained impact load. There are some differences between standards, although standard procedures are well defined. Therefore, instrumented Charpy impact test method has a problem that measurement value is different depending on each standard. In the present study, the effect of striking edge geometries, which are difference between ISO and ASTM, on load-deflection curve and absorbed energy were investigated. According to ISO and ASTM, two types of striker having different radius were machined. There was no difference between the two different striking edge geometries for values of absorbed energy per unit ligament area less than 0.75J/mm2. However, striking edge geometry according to ASTM is not propriety for Charpy impact test method because of four, instead of three, point bending on process of fracture at high level of absorbed energy. The effect of brinelling deformation, which was considered as an advantage of striking edge geometry according to ASTM, is very small on instrumented Charpy impact test. Consequently, there seem to be not an advantage of striking edge geometry according to ASTM. Therefore, standards should be unified in the striking edge geometry according to ISO.

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