scholarly journals Hot crack susceptibility of cast Mg 97 Y 2 Zn 1

2021 ◽  
Author(s):  
Christina Krbetschek ◽  
Ricardo Trân ◽  
Heike Wemme ◽  
Madlen Ullmann ◽  
Ulrich Prahl ◽  
...  
Keyword(s):  
Hot Crack ◽  
Crack Susceptibility

Hot crack susceptibility in multi-pass welds of reduced activation ferritic/martensitic steel F82H

2018 ◽  
Vol 511 ◽  
pp. 556-559
Author(s):  
H. Mori ◽  
H. Tanimura ◽  
R. Kiyoku ◽  
M. Fujiwara ◽  
T. Kato ◽  
...  
Keyword(s):  
Martensitic Steel ◽  
Hot Crack ◽  
Crack Susceptibility

Determination of hot crack susceptibility in various kinds of steels

1996 ◽  
Vol 17 (5-6) ◽  
pp. 261-265 ◽  
Author(s):  
Alpay Ankara ◽  
Haldun Bülent Ari
Keyword(s):  
Hot Crack ◽  
Crack Susceptibility

The evaluation of hot crack susceptibility of Fe30Mn10AlXC weld metal by using varestraint test

1989 ◽  
Vol 23 (7) ◽  
pp. 1109-1114 ◽  
Author(s):  
Chang-Pin Chou ◽  
Chien-Hsun Lee
Keyword(s):  
Weld Metal ◽  
Hot Crack ◽  
Varestraint Test ◽  
Crack Susceptibility

The Effect of Weld Metal Manganese Content on the Microstructure, Mechanical Properties and Hot Crack Susceptibility of Helically Welded Linepipes

2008 ◽  
Author(s):  
Navid Pourkia ◽  
Pirooz Marashi ◽  
Rouzbeh Leylabi ◽  
Seyed Alireza Tabatabaei ◽  
Hadi Torshizi
Keyword(s):  
Mechanical Properties ◽  
Grain Boundary ◽  
Weld Metal ◽  
Acicular Ferrite ◽  
Microalloyed Steels ◽  
Second Phase ◽  
Optimum Level ◽  
Hot Crack ◽  
Mn Content ◽  
Crack Susceptibility

The effect of manganese addition on decreasing hot crack susceptibility of submerged arc welding in microalloyed steels is well understood, but its increment should not cause unsuitable changes in metallurgical and mechanical properties of weld metal. Therefore, since weld metal Mn content in SAW process is mainly controlled by welding wire composition, the aim of this investigation is to study the effect of wire Mn content on the microstructure, mechanical properties and hot crack susceptibility of helical linepipes weld metal. In this regard, three different wires with 0.88, 1.05 and 1.54 wt% of Mn content were selected and welding was performed in both experimental and production process condition of X70 helical linepipes. As a result, 1.26, 1.44 and 1.67 wt% of Mn in weld metal was obtained respectively. Metallographical examinations using optical and scanning electron microscopy showed that, increasing the amount of Mn in weld metal, decrease the grain size of all phases (acicular ferrite, primary ferrite and ferrite with aligned second phase). Moreover, in the expense of increasing acicular ferrite, the volume fraction of primary ferrite (mostly grain boundary ferrite) and ferrite with aligned second phase decreased. Also, the results of mechanical properties indicated that the higher the amount of Mn, the higher the strength and hardness of weld metal, but in the case of impact toughness and tensile elongation, an optimum level was observed and lower toughness in the highest Mn content weld metal is attributed to the increasing hardenability and thus formation of martensite/retained austenite islands and grain boundary carbides in coincident sites of acicular ferrite grains. Moreover, analyzes in more than 1000m helical linepipes weld metal length showed that increasing weld metal Mn content up to 1.4wt%, reduced the possibility of hot crack formation from total percentage of 0.005 to around 0.001.

A Weldability Study of Nickel-Iron-Cobalt Hydrogen Resistant Alloys Using Weld Simulation in Parallel with Variable Restraint Testing

2010 ◽  
Vol 638-642 ◽  
pp. 3763-3768
Author(s):  
D.W. Walsh ◽  
Mark L. Bright ◽  
Trevor L. Jackson ◽  
D.B. Gibbs
Keyword(s):  
Crack Initiation ◽  
Weld Metal ◽  
Material Microstructure ◽  
Nickel Iron ◽  
Varestraint Testing ◽  
Hot Crack ◽  
History Of ◽  
Maximum Crack ◽  
Crack Susceptibility ◽  
High Rejection

Incoloy 903 overlays have been used to provide hydrogen environment embrittlement (HEE) resistance to welds in nickel alloy 718 structures. This is problematic because application of the required overlays has a history of high rejection and rework due to interpass microfissuring. Kovar has been identified as a potential hydrogen resistant replacement for Incoloy 903. A weldability study was initiated to compare the hot crack (microfissure) resistance of the two alloys to determine if substitution of Kovar for Incoloy 903 has the potential to improve the fabricability of HEE overlays. Varestraint testing indicates that Kovar has much higher crack initiation strains for both HAZ and weld metal cracking. Crack initiation strains were approximately 2% for Kovar while Incoloy 903 crack initiation strains were only 0.25% . Maximum crack lengths (MCL) observed on Kovar Varestraint tests were 0.12mm and 0.58mm for base and weld metal respectively, while 903 MCLs were 0.56mm and 2.3mm. Gleeble hot ductility testing indicates that Kovar has a nil ductility range of 7 degrees C while Incoloy 903 has a range of approximately 45 degrees C. The larger range observed for 903 is an indication of its greater crack susceptibility. Fabricability was correlated to material microstructure using optical microscopy, scanning electron microscopy and microprobe analysis.

Effect of cooling rate on hot-crack susceptibility of duplex stainless steel

2009 ◽  
Vol 506 (1-2) ◽  
pp. 191-195 ◽  
Author(s):  
Zhijun Li ◽  
Honggang Zhong ◽  
Quanzhi Sun ◽  
Zhengqi Xu ◽  
Qijie Zhai
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Cooling Rate ◽  
Hot Crack ◽  
Crack Susceptibility

A Study of Ductility Dip Cracking of Inconel 690 Welding Filler Metal: Development of a Refusion Cracking Test

2017 ◽  
Author(s):  
Abel Rapetti ◽  
Patrick Todeschini ◽  
Sofiane Hendili ◽  
Frédéric Christien ◽  
Franck Tancret
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Tensile Tests ◽  
Primary Circuit ◽  
Fast Heating ◽  
Pressurized Water ◽  
Hot Crack ◽  
Inconel 690 ◽  
Crack Susceptibility ◽  
Filler Metals

Inconel® alloy 690 is nowadays commonly used instead of 600 for the manufacturing of certain components of the primary circuit of pressurized water reactor (PWR) nuclear power plants, due to its superior resistance to corrosion and stress corrosion cracking. However 690 alloy, and the corresponding welding filler metals (types 52 and 152), can be sensitive to a solid state hot cracking phenomenon during welding, called “ductility dip cracking” (DDC) associated to grain boundary cracking. This work is undertaken to determine more precisely the thermomechanical conditions of the occurrence of DDC in two types of materials: filler metals 52M and 152. To do this, we designed a simple hot crack susceptibility test. This test is based on multiple welding beads on a cuboidal mockup. This test clearly demonstrates the effect of multiple passes on the occurrence of DDC. In parallel, hot tensile tests following fast heating were performed to determine the DDC temperature range, to try and correlate DDC to the thermomechanical behavior.

Effect of Residual Elements on Hot-Crack Susceptibility of Austenitic Stainless Steel

2004 ◽  
Vol 75 (10) ◽  
pp. 672-679 ◽  
Author(s):  
Piotr R. Scheller ◽  
Wolfgang Bleck ◽  
Roman Flesch
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Hot Crack ◽  
Residual Elements ◽  
Crack Susceptibility

Influence of heat treatment on microstructure and hot crack susceptibility of laser-drilled turbine blades made from René 80

2008 ◽  
Vol 59 (11) ◽  
pp. 1564-1571 ◽  
Author(s):  
W. Österle ◽  
S. Krause ◽  
T. Moelders ◽  
A. Neidel ◽  
G. Oder ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Turbine Blades ◽  
Hot Crack ◽  
Crack Susceptibility
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