Long-term heating of a new low alloy steel

1991 ◽  
Vol 10 (7) ◽  
pp. 367-368
Author(s):  
I. Tsuji
Keyword(s):  
Alloy Steel ◽  
Low Alloy Steel

Hydrogen enhanced crack propagation of SCM440H low-alloy steel under long-term varying load

2010 ◽  
Vol 77 (11) ◽  
pp. 1963-1974 ◽  
Author(s):  
Yoshiyuki Kondo ◽  
Masanobu Kubota ◽  
Katsuya Shimada
Keyword(s):  
Crack Propagation ◽  
Alloy Steel ◽  
Low Alloy Steel

Assessment of toughness in long term service CrMo low alloy steel by fracture toughness and small punch test

2011 ◽  
Vol 241 (5) ◽  
pp. 1407-1413 ◽  
Author(s):  
Kaishu Guan ◽  
Li Hua ◽  
Qiongqi Wang ◽  
Xiaohui Zou ◽  
Ming Song
Keyword(s):  
Fracture Toughness ◽  
Alloy Steel ◽  
Low Alloy Steel ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test

Investigation of Microstructural Changes due to Thermal Aging in Dissimilar Metal Welds

2014 ◽  
Author(s):  
Kyoung Joon Choi ◽  
Seung Chang Yoo ◽  
Chi Bum Bahn ◽  
Ji Hyun Kim
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Alloy Steel ◽  
Thermal Aging ◽  
Boundary Region ◽  
Low Alloy Steel ◽  
Chemical Gradient ◽  
Fusion Boundary ◽  
Dissimilar Metal

To investigate the effect of long-term thermal aging on the fusion boundary region between low-alloy steel A533 Gr. B and weld metal Alloy 152, a representative dissimilar weld mockup composed of Alloy 690/Alloy 152/A533 Gr. B was aged in laboratory furnaces under accelerated temperature conditions. The aging time was determined using the diffusion equation. The heat treatment was performed at 450°C for 60-y equivalent time (5,500 h) to simulate thermal aging effects. An additional aging heat treatment was also performed at 400°C for 15- and 30-y equivalent times (6,450 and 12,911 h, respectively) to determine the effects of temperature on aged microstructures. The characterization was mainly conducted in the microstructure of the fusion boundary region in the weld root region using scanning electron microscopy, transmission electron microscopy, and three-dimensional atom probe tomography. It was determined that the region near the fusion boundary was generally divided into several regions, such as a dilution zone (that included a chemical gradient in the weld side), fusion boundary, and heat-affected zone in the low-alloy steel. The results of this study showed that heat treatment increased Cr content in the dilution zone, but the chemical gradient in the weld side near the fusion boundary persisted. For the microstructure, it was observed that treatment induced the formation and growth of Cr precipitates in the fusion boundary region of the dissimilar metal joints due to the thermodynamic driving force. At two heat treatment conditions (400 and 450°C), although the extent of the results described above differed, the trend in the results appeared to be the same. This microstructure information can improve the understanding of cracking-resistant change when structural changes occur. Furthermore, such data will be important for assessing the effects of aging on structural components and for evaluating the long-term operation of nuclear power plants.

Fatigue resistance of low-alloy steel post long-term plasma-nitriding

2016 ◽  
Vol 94 (2) ◽  
pp. 86-91
Author(s):  
P. Čelko ◽  
M. Kuffová ◽  
A. Shearman
Keyword(s):  
Alloy Steel ◽  
Fatigue Resistance ◽  
Plasma Nitriding ◽  
Low Alloy Steel

On Corrosion Resistance Of Austenitic Stainless Steel Clad Layer on a Low Alloy Steel

2018 ◽  
Vol 32 (3) ◽  
pp. 20
Author(s):  
Manas Kumar Saha ◽  
Ritesh Hazra ◽  
Ajit Mondal ◽  
Santanu Das
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Alloy Steel ◽  
Low Alloy Steel ◽  
Clad Layer

Hot deformation simulation of modified AISI 5120 low alloy steel

2017 ◽  
Author(s):  
Diego Boschetti ◽  
Ana Paola Braga ◽  
Paula Fernanda da Silva Farina
Keyword(s):  
Alloy Steel ◽  
Hot Deformation ◽  
Low Alloy Steel ◽  
Deformation Simulation
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