Load-Point Compliance of the Charpy Impact Specimen

2009 ◽  
pp. 30-30-20 ◽  
Author(s):  
HJ Saxton ◽  
AT Jones ◽  
AJ West ◽  
TC Mamaros
Keyword(s):  
Charpy Impact ◽  
Load Point ◽  
Impact Specimen

Recent Progress in Subsized Charpy Impact Specimen Testing for Fusion Reactor Materials Development

1986 ◽  
Vol 10 (3P2A) ◽  
pp. 728-733 ◽  
Author(s):  
G.E. Lucas ◽  
G.R. Odette ◽  
J.W. Sheckherd ◽  
M.R. Krishnadev
Keyword(s):  
Recent Progress ◽  
Fusion Reactor ◽  
Charpy Impact ◽  
Materials Development ◽  
Impact Specimen ◽  
Reactor Materials

Reconstitution of V-Notched Charpy Impact Specimen Made of Short Insert

2006 ◽  
Author(s):  
Toru Osaki ◽  
Hiroshi Matsuzawa
Keyword(s):  
Fracture Toughness ◽  
Pressure Vessel ◽  
Nuclear Power ◽  
Charpy Impact ◽  
Pressure Vessels ◽  
Reactor Pressure Vessel ◽  
Absorption Energy ◽  
Impact Specimen ◽  
Insert Length ◽  
Reactor Pressure

Reconstitution in this paper means to constitute the original size V-notched Charpy impact specimen, which is made of the irradiated insert cut out from broken piece and un-irradiated tabs welded to the insert. It is a promising technique to secure an adequate number of surveillance specimens for long-term operation of nuclear power plants. Every Japanese nuclear power plant has its own surveillance test program, and is operated considering its unique surveillance test results along with the general reduction tendency of fracture toughness. This practice should be continued and enhanced if possible, after the full use of originally installed specimens, because its fracture toughness is lower than before. Reconstitution of V-notched Charpy impact specimens to the original shape by using a short insert was studied. Charpy absorption energy is generally shifted by reconstitution, if the insert length is as short as 10 mm. Reconstitution with a short insert is necessary when the transverse property of the original specimen is required although only the longitudinal surveillance specimen is installed as in some early constructed reactor pressure vessels in Japan. This case is important when the reactor pressure vessel is suspected to be a so-called low upper shelf toughness reactor pressure vessel. The minimum required insert length to avoid affect on the specimen properties depends on the Charpy absorption energy of the insert and reconstitution weld condition. Correlation between Charpy absorption energy and plastic deformation size, and short time annealing properties of irradiated pressure vessel steels were investigated. A method to evaluate the minimum required insert length was proposed, which depends on the expected Charpy absorption energy and thermal transient during reconstitution. It was demonstrated that the reconstituted specimens of 10 mm-long irradiated inserts, whose upper shelf absorption energy was 69J and required insert length was 9.5mm, showed little shift of upper shelf absorption energy.

Nonlinear Ultrasonic Characterization of Radiation Damage Using Charpy Impact Specimen

2014 ◽  
pp. 1-17
Author(s):  
Kathryn H. Matlack ◽  
Jin-Yeon Kim ◽  
James J. Wall ◽  
Jianmin Qu ◽  
Laurence J. Jacobs
Keyword(s):  
Radiation Damage ◽  
Charpy Impact ◽  
Ultrasonic Characterization ◽  
Impact Specimen ◽  
Nonlinear Ultrasonic

Comparing fast inductive tempering and conventional tempering: Effects on microstructure and mechanical properties

2018 ◽  
Vol 115 (4) ◽  
pp. 407 ◽  
Author(s):  
Annika Eggbauer Vieweg ◽  
Gerald Ressel ◽  
Peter Raninger ◽  
Petri Prevedel ◽  
Stefan Marsoner ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Impact Energy ◽  
Charpy Impact ◽  
Heat Treating ◽  
Processing Route ◽  
High Heating Rate ◽  
Heating Rates ◽  
High Heating ◽  
Tempering Treatment ◽  
Carbide Distribution

Induction heating processes are of rising interest within the heat treating industry. Using inductive tempering, a lot of production time can be saved compared to a conventional tempering treatment. However, it is not completely understood how fast inductive processes influence the quenched and tempered microstructure and the corresponding mechanical properties. The aim of this work is to highlight differences between inductive and conventional tempering processes and to suggest a possible processing route which results in optimized microstructures, as well as desirable mechanical properties. Therefore, the present work evaluates the influencing factors of high heating rates to tempering temperatures on the microstructure as well as hardness and Charpy impact energy. To this end, after quenching a 50CrMo4 steel three different induction tempering processes are carried out and the resulting properties are subsequently compared to a conventional tempering process. The results indicate that notch impact energy raises with increasing heating rates to tempering when realizing the same hardness of the samples. The positive effect of high heating rate on toughness is traced back to smaller carbide sizes, as well as smaller carbide spacing and more uniform carbide distribution over the sample.

ALLVAC 13-8 SUPER TOUGH

Alloy Digest ◽  
2003 ◽  
Vol 52 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Precipitation Hardening ◽  
Cold Working ◽  
Charpy Impact ◽  
Heat Treating ◽  
General Corrosion ◽  
Single Treatment ◽  
Good Resistance ◽  
Temperature Performance ◽  
Impact Energies

Abstract Allvac 13-8 Super Tough alloy is a modification of the standard Allvac 13-8 alloy. (See Alloy Digest SS-866, November 2002.) It has good fabricability and can be age hardened by a single treatment in the range 510 to 621 deg C (950 to 1150 deg F). Cold working prior to aging enhances the aging. These properties supplement the superior fracture toughness and Charpy impact energies. This martensitic precipitation-hardening stainless steel has very good resistance to general corrosion and stress-corrosion cracking. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-876. Producer or source: Allvac.

Sign in / Sign up

Export Citation Format

Share Document