Welding Journal最新文献_第2页

An Analytical Model of Material Deformation During Friction Welding of Alloy 718 合金 718 摩擦焊接过程中材料变形的分析模型

IF 2.2 3区材料科学

Welding Journal Pub Date : 2024-02-01 DOI: 10.29391/2024.103.014

Caleb Brown, Tracy W. NELSON, Carl Sorenson

引用次数: 0

Keyhole Welding with Hybrid Plasma-Free Arc Source 利用混合无等离子弧源进行锁孔焊接

IF 2.2 3区材料科学

Welding Journal Pub Date : 2024-02-01 DOI: 10.29391/2024/103.004

ZuMing Liu, Fei Liu, JiaYu Qiu

{"title":"Keyhole Welding with Hybrid Plasma-Free Arc Source","authors":"ZuMing Liu, Fei Liu, JiaYu Qiu","doi":"10.29391/2024/103.004","DOIUrl":"https://doi.org/10.29391/2024/103.004","url":null,"abstract":"Improving the keyhole welding process window is challenging work because the force and thermal state in the weld pool are hard to control. A hybrid plasma-free arc source was developed based on a plasma arc torch, sided tungsten was added close to the constraint orifice to form a free arc, and hybrid arcs formed after the free arc was fully absorbed into the constraint arc. In such a one-anode, twocathode hybrid arc system, the added free arc acts in an assistant role to adjust arc heat output without influencing the arc pressure peak, and the constraint arc acts as the guiding arc to control the arc pressure and slightly incline to the free arc side. Bead-on welding experiments were done to test keyhole welding process behavior with the hybrid arc source, including arc column, keyhole state, weld surface performance, and melting state in the weld pool. Results showed that (1) the hybrid arc can enlarge the stable keyhole welding process window in aspects of welding current and welding speed, and a more-obvious improving effect is obtained with the leading-sided tungsten; (2) the hybrid arc with the rear-sided tungsten has a smooth front weld surface; (3) the increased heat will enlarge the weld cross-section area with no obvious influence to the backside weld width; and (4) the leading keyhole wall is related to the outer tungsten position. The research gives a new method for improving keyhole welding stability.","PeriodicalId":23681,"journal":{"name":"Welding Journal","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139686465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A State-of-the-Art Review on Direct Welding of Polymer to Metal for Structural Applications: Part 2 — Joint Design and Property Characterization 结构应用中聚合物与金属直接焊接的最新技术综述：第 2 部分 - 接头设计和性能表征

IF 2.2 3区材料科学

Welding Journal Pub Date : 2024-02-01 DOI: 10.29391/2024.103.013

Abdul Sayeed Kahn, Pingsha Dong, Fengchao Liu, Yuning Zhang

{"title":"A State-of-the-Art Review on Direct Welding of Polymer to Metal for Structural Applications: Part 2 — Joint Design and Property Characterization","authors":"Abdul Sayeed Kahn, Pingsha Dong, Fengchao Liu, Yuning Zhang","doi":"10.29391/2024.103.013","DOIUrl":"https://doi.org/10.29391/2024.103.013","url":null,"abstract":"Structural lightweighting through the effective use of multiple materials has received increasing attention for fulfilling today’s demands for environmental sustainability in transportation systems. Direct dissimilar material joining methods (versus, e.g., traditional adhesive bonding or mechanical fastening) have become increasingly desirable since they offer process simplicity, production efficiency, and hermetic sealing, among others. In Part I of this two-part article, we provided a critical assessment of the state-of-the-art research and promising direct dissimilar material joining techniques reported over the last decades, with a particular emphasis on their potential for structural applications. As such, in Part 2, recent advances in advanced joint design and modeling methods for enabling optimum joint design for joint ability and joint performance are presented along with some detailed examples for demonstrating their potential impacts on industrial applications. Finally, recommendations on future research and development directions are outlined for supporting the industry’s drive towards multi-material lightweighting.","PeriodicalId":23681,"journal":{"name":"Welding Journal","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140464413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Boron on Stress-Relief Cracking Susceptibility of T23 Steel 硼对 T23 钢应力消除开裂敏感性的影响

IF 2.2 3区材料科学

Welding Journal Pub Date : 2024-01-01 DOI: 10.29391/2024.103.001

Dongdong Zhang, Xue Wang

{"title":"Influence of Boron on Stress-Relief Cracking Susceptibility of T23 Steel","authors":"Dongdong Zhang, Xue Wang","doi":"10.29391/2024.103.001","DOIUrl":"https://doi.org/10.29391/2024.103.001","url":null,"abstract":"The effect of boron on stress-relief cracking (SRC) sensitivity in the coarse grain heat-affected zone (CGHAZ) of ASME SA213-T23 was studied by thermo-mechanical simulation. Then, the fracture mode, microstructure, carbide evolution, and boron segregation were observed by an optical microscope, a scanning electron microscope, a transmission electron microscope, and an electron probe microanalyzer. Finally, the mechanism of increasing boron content to improve SRC resistance was described. The results showed that when the boron content is lower than 0.0038 wt.-%, T23 steel is sensitive to SRC at 550–750°C (1022–1382°F), and the sensitive temperature range narrows as the boron content increases. When the boron content increases to 0.010 wt.-%, SRC can be eliminated. Moreover, boron addition did not improve grain boundary (GB) strength nor did it fundamentally change the fracture mode at high temperatures, but it significantly improved intergranular ductility. This is because the boron segregation at the GB inhibits the precipitation of M23C6 carbides, which reduces the void nucleation and alloy element depletion near the GB, thus significantly improving intergranular plasticity. The improvement of intergranular plasticity gives the grain sufficient time to deform and greatly improves the overall plasticity of the CGHAZ. As a result, the SRC resistance of the welded joint is significantly improved because the stress can be released through enough plastic deformation during postweld heat treatment or service.","PeriodicalId":23681,"journal":{"name":"Welding Journal","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139126266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intelligent Prediction of FSW Physical Quantity and Joint Mechanical Properties FSW 物理量和接头机械性能的智能预测

IF 2.2 3区材料科学

Welding Journal Pub Date : 2024-01-01 DOI: 10.29391/2024.103.002

Xiaohong Lu, Fanmao Zeng, Y. Luan, X. Meng

引用次数: 0

Effect of Electron Beam Oscillation Welding of Molybdenum and Titanium 钼和钛的电子束振荡焊接效应

IF 2.2 3区材料科学

Welding Journal Pub Date : 2024-01-01 DOI: 10.29391/2024.103.003

XIN-MIN Shi, DE-FENG Mo, Tong Zhao, Yang Zhang, Wen Sun, HAI-MEI Gong, Xue Li

引用次数: 0

Repairing High γ’ Hot Section Gas Turbine Components Using Advanced Manufacturing 利用先进制造技术修复高γ'热段燃气轮机部件

IF 2.2 3区材料科学

Welding Journal Pub Date : 2023-12-01 DOI: 10.29391/2023.102.023

N. Sridharan, Yousub Lee, Brian Jordan, John Robertson, Ramesh Ramakrishnan

引用次数: 0

Stress Distribution of EH40 with Defects Considering Solid-State Phase Transformation 考虑固态相变的有缺陷 EH40 的应力分布

IF 2.2 3区材料科学

Welding Journal Pub Date : 2023-12-01 DOI: 10.29391/2023.102.024

LU WANG, Y. Rong, YU HUANG, JIAJUN XU, JIANG HU, Guojun Zhang

{"title":"Stress Distribution of EH40 with Defects Considering Solid-State Phase Transformation","authors":"LU WANG, Y. Rong, YU HUANG, JIAJUN XU, JIANG HU, Guojun Zhang","doi":"10.29391/2023.102.024","DOIUrl":"https://doi.org/10.29391/2023.102.024","url":null,"abstract":"Residual stress of laser-welded marine steel EH40 was experimentally and numerically analyzed considering weld defects (collapse, hump, and unfitness) and solid-state phase transformation (SSPT). A double-cylindrical source model was used to simulate the temperature distribution. The mean prediction errors of the model without and with weld defects along the plate thickness were 9.2 and 3.5%. Based on the thermodynamics of SSPT, microstructure fractions were computed and verified by weld hardness test results. Under the effect of SSPT, residual stress changed from compressive stress to tensile stress with the increase of the distance from the weld center. Weld defects have an influence on the value of residual stress, and this effect was greater when SSPT was considered. The affected zone extended from the vicinity of weld defects to the whole weld. The variations of longitudinal residual stress (LRS) and transverse residual stress (TRS) caused by weld defects and SSPT both exceeded 150 MPa. LRS was mainly affected by the loss and increase of metal, while TRS was affected by the stress concentration caused by shape geometry changes. Thus, the influence of weld defects on TRS was greater than that on LRS. The proposed finite element model considering weld defects and SSPT can be used to accurately predict residual stress in laser welding of marine steel EH40 and provide a theoretical basis to reduce welding stress.","PeriodicalId":23681,"journal":{"name":"Welding Journal","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139020582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Novel Strategy for Realizing Reliable Welding of Aluminum-Steel 实现铝钢可靠焊接的新策略

IF 2.2 3区材料科学

Welding Journal Pub Date : 2023-12-01 DOI: 10.29391/2023.102.022

Mingfeng Li, Yanjun Wang, Wu Tao, SHANGLU YANG

引用次数: 0

Impact of Plate Thickness and Joint Geometry on Residual Stresses in 347H Stainless Steel Welds 板厚和接头几何形状对347H不锈钢焊缝残余应力的影响

3区材料科学

Welding Journal Pub Date : 2023-11-01 DOI: 10.29391/2023.102.021

YU HONG, TIMOTHY PICKLE, ZHENZHEN YU, JUDITH VIDAL, CHAD AUGUSTINE

{"title":"Impact of Plate Thickness and Joint Geometry on Residual Stresses in 347H Stainless Steel Welds","authors":"YU HONG, TIMOTHY PICKLE, ZHENZHEN YU, JUDITH VIDAL, CHAD AUGUSTINE","doi":"10.29391/2023.102.021","DOIUrl":"https://doi.org/10.29391/2023.102.021","url":null,"abstract":"Weldments of 347H stainless steel are potentially susceptible to stress relaxation cracking at elevated service temperatures. Mitigation of stress relaxation cracking susceptibility within a multipass weld requires a good understanding of welding practices and manufacturing techniques to control high tensile residual stresses. In this work, the dependence of residual stress distribution in 347H stainless steel on base plate thickness, joint geometry design, and preheating condition was systematically investigated by using three-dimensional finite element models. The finite element models were validated through good agreement between neutron diffraction measurements and calculated elastic strains. The single-V-groove welds with and without a preheating step all produced similar peak von Mises residual stresses, above 450 MPa, within both the fusion zone and heat-affected zone (HAZ). In plates thicker than 0.5 in. (12.7 mm), high tensile residual stress could be observed in a relatively large area, from the middle of the plate thickness to underneath the top surface. A double-V groove shifted the high tensile stress area to the middle thickness of the weld. A single-J-groove weld was able to confine the residual stress to a very small region near the middle thickness within the fusion zone and suppressed the von Mises residual stress within the HAZ to below 400 MPa.","PeriodicalId":23681,"journal":{"name":"Welding Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135111269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0