Microstructures and Microhardness of SNCed Medium Carbon Low Alloy Steels

2005 ◽  
Vol 475-479 ◽  
pp. 137-140 ◽  
Author(s):  
Jun Bao Zhang ◽  
Yue Lian Liu ◽  
Xin Qing Zhao ◽  
J. Wu ◽  
Hong Wei Song ◽  
...  
Keyword(s):  
Indentation Test ◽  
Low Alloy Steels ◽  
Test Results ◽  
Medium Carbon ◽  
Nano Indentation ◽  
Transmission Electron ◽  
Average Grain Size ◽  
Alloy Steels ◽  
Nanostructured Layers ◽  
Means Of Transmission

Nanostructured layers were fabricated on the surface of 0.4C-1.0Cr and 1.0C-1.5Cr low alloy steels by using an ultrasonic particulate peening (USPP) technique. The microstructures and mechanical properties of the nanocrystallized layers were characterized by means of transmission electron microscopy, and nano-indentation test. Results showed that the average grain size in the surface nanocrystallized layer of 0.4C-1.0Cr and 1.0C-1.5Cr low alloy steel was about 5nm and 10nm, respectively. The nano-indentation hardnesses of the surface nanocrystallized layer were enhanced significantly and reach upwards of 8.0 GPa and 12.5 GPa, respectively.

scholarly journals Effect of Applied Tensile Stress on the Transformation Behavior of Medium Carbon Low Alloy Steels

1991 ◽  
Vol 77 (6) ◽  
pp. 816-823
Author(s):  
Yutaka KANETSUKI ◽  
Osamu KAIDA ◽  
Masato KAISO ◽  
Masaaki KATSUMATA
Keyword(s):  
Tensile Stress ◽  
Low Alloy Steels ◽  
Transformation Behavior ◽  
Medium Carbon ◽  
Alloy Steels ◽  
Applied Tensile Stress

Microstructures and Microhardness of SNCed Medium Carbon Low Alloy Steels

2005 ◽  
pp. 137-140 ◽  
Author(s):  
Jun Bao Zhang ◽  
Yue Lian Liu ◽  
Xin Qing Zhao ◽  
J. Wu ◽  
Hong Wei Song ◽  
...  
Keyword(s):  
Low Alloy Steels ◽  
Medium Carbon ◽  
Alloy Steels

Grain size effect of austenite on the kinetics of pearlite transformation in low- and medium-carbon low-alloy steels

2015 ◽  
Vol 6 (1) ◽  
pp. 41-44 ◽  
Author(s):  
A. E. Gvozdev ◽  
A. G. Kolmakov ◽  
D. A. Provotorov ◽  
I. V. Minaev ◽  
N. N. Sergeev ◽  
...  
Keyword(s):  
Grain Size ◽  
Size Effect ◽  
Low Alloy Steels ◽  
Grain Size Effect ◽  
Medium Carbon ◽  
Alloy Steels ◽  
Kinetics Of

Effect of stress concentrations of size effect in the fatigue of medium-carbon and low-alloy steels

1980 ◽  
Vol 12 (3) ◽  
pp. 285-290 ◽  
Author(s):  
M. M. Matseiko ◽  
V. I. Pokhmurskii ◽  
G. N. Filimonov
Keyword(s):  
Size Effect ◽  
Low Alloy Steels ◽  
Stress Concentrations ◽  
Medium Carbon ◽  
Alloy Steels

Erratum to: Interrelation of Steel Composition, Hardening Route, and Tempering Response of Medium Carbon Low-Alloy Steels

2016 ◽  
Vol 25 (11) ◽  
pp. 5125-5125 ◽  
Author(s):  
Abdel-Hamid A. Hussein ◽  
Mahmoud T. Abdu ◽  
El-Sayed M. El-Banna ◽  
Saied E. Soliman ◽  
Mahmoud M. Tash
Keyword(s):  
Low Alloy Steels ◽  
Steel Composition ◽  
Medium Carbon ◽  
Alloy Steels

Microstructures and Properties of HAZ of JB800 Bainite Steel

2014 ◽  
Vol 670-671 ◽  
pp. 65-69
Author(s):  
Jun Sheng Sun ◽  
Hong Quan Wang
Keyword(s):  
Impact Toughness ◽  
Lower Cost ◽  
Welding Process ◽  
High Strength ◽  
Granular Bainite ◽  
Low Alloy Steels ◽  
Test Results ◽  
Bainite Steel ◽  
Alloy Steels ◽  
Allotriomorphic Ferrite

JB800 steel has grain boundary allotriomorphic ferrite and granular bainite (FGBA/BG), and it is a kind of high strength low alloy steels, which has simple produce procedure, lower cost and excelled property. The law of microstructure transformation in CGHAZ, hardness, and impact toughness in HAZ of JB800 steel were studied by means of thermal simulation. The test results show that under the general condition of welding process (t8/5=5~50s), microstructure of CGHAZ is composed of mixture microstructure of Martensite and Bainite and with the increase of cooling rate, the content of Martensite will decrease, but that of Bainite will increase; when t8/5 is 20s, CGHAZ zone have better impact toughness, which is composed of 95% Martensite and 5% Bainite. Therefore t8/5 should be controlled at about 20s to get better impact toughness.

Review and Consideration of Unsettled Problems on Evaluation of Fatigue Damage in LWR Water

2006 ◽  
Vol 129 (1) ◽  
pp. 186-194
Author(s):  
Makoto Higuchi ◽  
Katsumi Sakaguchi
Keyword(s):  
Fatigue Life ◽  
Mechanical Test ◽  
Low Alloy Steels ◽  
Test Results ◽  
Considerable Effort ◽  
Test Conditions ◽  
Fatigue Data ◽  
Alloy Steels ◽  
Fatigue Life Reduction ◽  
Year 2000

Reduction in the fatigue life of structural materials of nuclear components in Light Water Reactor (LWR) water was initially detected and examined by the authors in the 1980s, who subsequently directed considerable effort to the development of a method for evaluating this reduction quantitatively. Since the first proposal of equations to calculate environmental fatigue life reduction for carbon and low-alloy steels was published in 1985 by Higuchi and Sakamoto (J. Iron Steel Inst. Jpn. 71, pp. 101–107), many revisions were made based on a lot of additional fatigue data in various environmental and mechanical test conditions. The latest models for evaluation using Fen of the environmental fatigue life correction factor were proposed for carbon and low alloy steels in the year 2000 and for austenitic stainless steel, in 2002. Fen depends on some essential variables such as material, strain rate, temperature, dissolved oxygen and sulfur concentration in steel. The equation for determining Fen is given by each parameter for each material. These models, having been developed three to five years ago, should be properly revised based on new test results. This paper reviews and discusses five major topics pertinent to such revision.

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