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Effective grain size and charpy impact properties of high

Ultrahigh Charpy impact toughness (~450J) achieved in high

Feb 02,2017 Effective grain size and charpy impact properties of high#0183;Ultrahigh Charpy impact toughness (~450J) achieved in high strength ferrite/martensite laminated steels in a low carbon steel controlled by effective grain size. on tensile and Charpy Ultrahigh Charpy impact toughness (~450J) achieved in high Feb 02,2017 Effective grain size and charpy impact properties of high#0183;Ultrahigh Charpy impact toughness (~450J) achieved in high strength ferrite/martensite laminated steels in a low carbon steel controlled by effective grain size. on tensile and Charpy The effect of the austenite grain refinement on the grain size followed the guidelines of the ASTM-E112 standard.The specimens for the tensile and the V-notched Charpy impact testing were cut and prepared by electrical discharge machining (EDM),with geometry and dimensions given by ASTM-E8M and ASTM-E23 standards,respectively.The tensile tests were performed on a MTS Sintech machine

The effect of the austenite grain refinement on the

grain size followed the guidelines of the ASTM-E112 standard.The specimens for the tensile and the V-notched Charpy impact testing were cut and prepared by electrical discharge machining (EDM),with geometry and dimensions given by ASTM-E8M and ASTM-E23 standards,respectively.The tensile tests were performed on a MTS Sintech machineTechnical Report UDC 669 .14 .018 .85 Heat-Resistant of solid solution hardening by nitrogen addition,grain size control,and grain boundary strengthening by boron addition.3.2.3 Microstructural stability Figure 7 shows Charpy impact test results of the steels after ag-ing for 3,000 h at 700 to 900C,the temperatureStructureproperty relationships for normalised flanges Jul 18,2013 Effective grain size and charpy impact properties of high#0183;No benefit to predictability was found from inclusion of a term for the degree of coverage of the boundaries by the carbides,probably because of the strong interrelationship between this term and the grain size.In addition to this work,the Charpy impact energy at 0 Effective grain size and charpy impact properties of high#176;C was also obtained for flanges so that the technique could be extended to

Specifying fracture toughness ranks high in line pipe

The transition is shown in Fig.1 (82553 bytes) as characterized by two types of impact specimens (Charpy V-notch specimens and drop-weight tear tests).Both absorbed energy and shear area change SUSCEPTIBILITY TO BRITTLE FRACTURE OF FLANGES INflange had a coarse grained (ASTM grain size number 5 to 6) ferrite-pearlite microstructure,see Figure 3.The 27 J Charpy-V impact transition temperature was about +10 Effective grain size and charpy impact properties of high#176;C.An additional heat treatment at BWI (normalising at 900 Effective grain size and charpy impact properties of high#176;C for one hour) resulted in grain refinement to ASTM grain sizeSHAPE MATERIAL (ASTM A572 Gr 50 with specialS91.1 The steel shall be killed with a fine austenitic grain size.SX3.Charpy V-Notch Impact Test for Group 4 and 5 Structural Shapes SX3.1 When Group 4 and 5 structural shapes are used as members subject to primary tensile stress and when such members are spliced using full penetration welds,the steel shall be impact tested in accordance with

Review Mechanical Property of Ultrafine Elongated

tion of ultrafine-grained structures and mechanical property is systematically investigated in medium-carbon low-alloy steels.Figure 1 plots the Charpy V-notch impact absorbed energy,vE,as a function of yield strength, ys,at room temperature for various steels.23,24) High-alloy steels,2529)Report on the Longitudinal Charpy V-Notch Modelstrong influence on Charpy impact properties.When impurities (sulfur and phosphorus) are too high,the chance of obtaining satisfactory test results would diminish.This is more evident when testing at lower temperatures.To account for grain size,the ratioPrevious123456NextEffects of Molybdenum and Vanadium Addition on - VanitecEffects of Molybdenum and Vanadium Addition on Tensile and Charpy Impact Properties of API X70 Linepipe Steels In these specimens,a substantial increase in the strengths was achieved only when Mo was added to the high-V alloy. region could be explained by the decrease in the overall effective grain size due to the presence of AF having

Mechanical Properties of SA508 Gr.4N Model Alloys as a

The Mo addition did not change the toughness properties significantly.The Cr contents were more effective on the fracture toughness through changing the carbides precipitation characteristics and the Ni contents were effective on the Charpy impact toughness through changing the effective grain size.Influence of Rolling Temperature and Cooling Rate on Thermo-mechanical control processing (TMCP) is a powerful tool for development of high strength low alloy (HSLA) steels.The understanding of the effect of process parameters on the microstructure of these steels is a key aspect for the optimization of their mechanical properties.The influence of the rolling temperatures and the cooling conditions on the texture,strength and toughness of Influence of Rolling Temperature and Cooling Rate on Thermo-mechanical control processing (TMCP) is a powerful tool for development of high strength low alloy (HSLA) steels.The understanding of the effect of process parameters on the microstructure of these steels is a key aspect for the optimization of their mechanical properties.The influence of the rolling temperatures and the cooling conditions on the texture,strength and toughness of

Estimation of Impact Toughness Transition Temperatures of

High strength and sufficient toughness are key requirements for modern high-performance structural steels.In an attempt to develop a suitable estimation of impact toughness transition temperatures for as-quenched steels,we investigated the determiners of low-temperature toughness with a group of thermomechanically rolled direct-quenched steels with varying martensite contents.Estimation of Impact Toughness Transition Temperatures of High strength and sufficient toughness are key requirements for modern high-performance structural steels.In an attempt to develop a suitable estimation of impact toughness transition temperatures for as-quenched steels,we investigated the determiners of low-temperature toughness with a group of thermomechanically rolled direct-quenched steels with varying martensite contents.Effects of Ti addition and reheating quenching on grain Feb 01,2012 Effective grain size and charpy impact properties of high#0183;The high angle grain boundary (HAGBs) and effective grain size (EGS) were analyzed by EBSD.Thin-foil specimens for TEM and EBSD observations were cut from the specimens and prepared by twin-jet electrolytic polishing using a solution of

Effects of Molybdenum and Vanadium Addition on Tensile

This study is concerned with the effects of V and Mo addition on tensile and Charpy impact properties of API X70 linepipe steels.Twelve kinds of steel specimens were produced by varying V and Mo additions and rolling conditions.The addition of V and Mo promoted the formation of acicular ferrite (AF),banitic ferrite (BF),and martensite-austenite (MA) constituents,while suppressing the Effects of Molybdenum and Vanadium Addition on TensileEffects of Molybdenum and Vanadium Addition on Tensile and Charpy Impact Properties of API X70 Linepipe Steels In these specimens,a substantial increase in the strengths was achieved only when Mo was added to the high-V alloy. region could be explained by the decrease in the overall effective grain size due to the presence of AF having Effects of Inclusions and Microstructures on Impact Energy Apr 06,2005 Effective grain size and charpy impact properties of high#0183;However,as the heat input increased,the average size of inclusions increased but their number density decreased.It was also observed that the grain sizes of polygonal ferrite with increased heat input.Accordingly,the decrease of the Charpy impact energy with the heat input is inevitable due to these microstructural changes.

Effects of Complex Oxides on Charpy Impact Properties

Charpy impact properties of the welded regions can be de- ary phases present in the steels and effective grain size.in 1cm3,average oxide size,and volume fraction of oxides were measured, the S1 steel,and has high yield ratio of 85% and lower elongation of 18%.TheEffective grain size and charpy impact properties of high The correlation of microstructure and Charpy V-notch (CVN) impact properties of a high-toughness API X70 pipeline steel was investigated in this study.Six kinds of steel were fabricated by varying the hot-rolling conditions,and theirEffective grain size and charpy impact properties of high Aug 01,2005 Effective grain size and charpy impact properties of high#0183;The correlation of microstructure and Charpy V-notch (CVN) impact properties of a high-toughness API X70 pipeline steel was investigated in this study.Six kinds of steel were fabricated by varying the hot-rolling conditions,and their microstructures,effective grain sizes,and CVN impact properties were analyzed.The CVN impact test results indicated that the steels rolled in the single

Effective Grain Size and Charpy Impact Properties of

Aug 06,2004 Effective grain size and charpy impact properties of high#0183;Effective Grain Size and Charpy Impact Properties of High-Toughness X70 Pipeline Steels BYOUNGCHUL HWANG,YANG GON KIM,SUNGHAK LEE,YOUNG MIN KIM,NACK J.KIM,and JANG YONG YOO The correlation of microstructure and Charpy V-notch (CVN) impact properties of a high-toughness API X70 pipeline steel was investigated in this study.Effect of microstructure on the impact toughness and Jan 09,2018 Effective grain size and charpy impact properties of high#0183;The effect of impact toughness and temper embrittlement are discussed from the viewpoint of carbide size,block size,fraction of high-angle grain boundaries (HAGBs) and grainEffect of inclusions and microstructural characteristics @article{osti_201026,title = {Effect of inclusions and microstructural characteristics on the mechanical properties and fracture behavior of a high-strength low-alloy steel},author = {Ray,A and Paul,S K and Jha,S},abstractNote = {The strength and toughness properties of hot-rolled plates from three commercial heats of a high-strength low-alloy steel were investigated with respect to

Effect of Thermo-Mechanical Parameters on

ever the specimen without Nb and high content of Carbon shows different behavior.20 40 60 80 012 3 Charpy Impact Energy (J) Sample Number C.R.= 0.5 Effective grain size and charpy impact properties of high#176;C/s C.R.=1.5 Effective grain size and charpy impact properties of high#176;C/s Preheating= 1180 Effective grain size and charpy impact properties of high#176;C Reheating= 1240 Effective grain size and charpy impact properties of high#176;C FIG.2 Variation of charpy impact energy with rolling parameters.15 17 19 21 23 25 0123 Elongation (%) Sample Number C.R.=0.5 Effective grain size and charpy impact properties of high#176;C/s C.R Effect of Thermo-Mechanical Parameters onever the specimen without Nb and high content of Carbon shows different behavior.20 40 60 80 012 3 Charpy Impact Energy (J) Sample Number C.R.= 0.5 Effective grain size and charpy impact properties of high#176;C/s C.R.=1.5 Effective grain size and charpy impact properties of high#176;C/s Preheating= 1180 Effective grain size and charpy impact properties of high#176;C Reheating= 1240 Effective grain size and charpy impact properties of high#176;C FIG.2 Variation of charpy impact energy with rolling parameters.15 17 19 21 23 25 0123 Elongation (%) Sample Number C.R.=0.5 Effective grain size and charpy impact properties of high#176;C/s C.R Effect of Heat Input on Properties of Inconel Filler Metal grain size and mechanical properties (Refs.2,3),weld yield strength and grain diameter have been shown to be related to each other by the Hall-Petch (Refs.10,11) equation. Effective grain size and charpy impact properties of highlt;ry = ui + Kyl-' where o-y is the yield stress,I is the grain diameter and c\ and Ky are con Effective grain size and charpy impact properties of high#173; stants; o-i

Effect of Effective Grain Size on Charpy Impact Properties

Effect of Effectiv e Grain Size on Charpy Impact Propert ies of High-S trength Bainitic S teels Sang Y ong Shin 1 ,Seung Y oub Han 1 ,Byoungchul Hwang 2 ,Chang Gil Lee 2 ,and Sunghak Lee 1,*Effect of Cooling Rate on the Microstructure and May 02,2016 Effective grain size and charpy impact properties of high#0183;Medium carbon steel is being widely used for machinery structural parts.The microstructure,tensile and impact behaviour of a commercial medium carbon forging steel (AISI 1035) have been determined before and after forging with respect to different cooling conditions in a hydraulic press at 950 Effective grain size and charpy impact properties of high#176;C.Final microstructures and mechanical properties were evaluated by opticalEffect of Cooling Rate on the Microstructure and May 02,2016 Effective grain size and charpy impact properties of high#0183;Medium carbon steel is being widely used for machinery structural parts.The microstructure,tensile and impact behaviour of a commercial medium carbon forging steel (AISI 1035) have been determined before and after forging with respect to different cooling conditions in a hydraulic press at 950 Effective grain size and charpy impact properties of high#176;C.Final microstructures and mechanical properties were evaluated by optical

Cited by 164Publish Year 2005Author Byoungchul Hwang,Yang Gon Kim,Sunghak Lee,Young Min Kim,Nack J.Kim,Jang Yong YooEffective grain size and Charpy impact properties of high

Effective grain size and Charpy impact properties of high-toughness X70 pipeline steels Article (PDF Available) in Metallurgical and Materials Transactions A 36(8):2107-2114 August 2005 with Cited by 164Publish Year 2005Author Byoungchul Hwang,Yang Gon Kim,Sunghak Lee,Young Min Kim,Nack J.Kim,Jang Yong YooEffect of rolling reduction below non-recrystallization The microstructures and texture were characterized,and the low-temperature Charpy impact toughness was tested as well for each plate.Variations in toughness were significant among the steels,being highly correlated with the effective grain size (EGS),amount of high angle grainBasic Research of Weld Process and MicrostructureHowever,developing an effective way to model the weld mechanical properties of extra-high strength steels remains a major technical challenge.Addressing this technical challenge,the overall goal of this research is to develop the basic data of prior austenite grain size,hardness and Charpy impact toughness.The microstructure

A Study of the Weld Heat-Affected Zone Toughness of

pose that the reduced effective grain size of a composite microstructure is respon Effective grain size and charpy impact properties of high#173; sible for the high observed toughness at cryogenic temperatures.Simulation and Analysis of Weld Heat-Affected Zones Welding can seriously alter the metal Effective grain size and charpy impact properties of high#173; lurgical properties and the stress state of the material immediately adjacent to the weld joint.12345NextEffects of Molybdenum and Vanadium Addition on - VanitecEffects of Molybdenum and Vanadium Addition on Tensile and Charpy Impact Properties of API X70 Linepipe Steels In these specimens,a substantial increase in the strengths was achieved only when Mo was added to the high-V alloy. region could be explained by the decrease in the overall effective grain size due to the presence of AF having

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