Welding International最新文献_第9页

Effect of thickness on mechanical properties of modified 9Cr 1Mo steel welds made by narrow gap hot wire gas tungsten arc welding process 厚度对窄间隙热丝-钨极气体保护焊改性9Cr 1Mo钢焊缝力学性能的影响

Welding International Pub Date : 2023-04-03 DOI: 10.1080/09507116.2023.2207750

Aravinda Pai, I. Sogalad, S. Basavarajappa

{"title":"Effect of thickness on mechanical properties of modified 9Cr 1Mo steel welds made by narrow gap hot wire gas tungsten arc welding process","authors":"Aravinda Pai, I. Sogalad, S. Basavarajappa","doi":"10.1080/09507116.2023.2207750","DOIUrl":"https://doi.org/10.1080/09507116.2023.2207750","url":null,"abstract":"Abstract Hot wire Gas Tungsten Arc Welding (GTAW) process is selected for the fabrication of thick section modified 9Cr 1Mo steel components of Steam Generators (SGs) for 500MWe Prototype Fast Breeder Reactor (PFBR) at Kalpakkam, India. During the welding procedure qualification for fabrication of SGs, the 30 mm and 62 mm thick modified 9Cr 1Mo steel welds were subjected to chemical analysis, visual examination, liquid penetrant examination, radiography examination, micro-hardness tests, longitudinal and transverse tensile tests (at ambient temperature and 525 °C), bend tests, drop weight tests and impact tests (at 0 °C and +18 °C). Literature reveals both positive and negative view on the welding of thick-section steel components. Limited information is available in the open literature on the effect of thickness on material properties of modified 9Cr 1Mo steel welds made by the hot wire GTAW method. In view of the above, authors attempted to systematically investigate the influence of thickness on the mechanical properties of modified 9Cr 1Mo steel welds made by the hot wire GTAW process. In this paper, the chemical compositions, hardness, tensile strength, bending strength and impact properties of 30 mm and 62 mm thick welds produced by narrow gap hot wire GTAW process are characterized and compared. It is found that the mechanical properties of 30 mm and 62 mm thick welds are comparable except the impact properties at 0 °C. The impact strength at 0 °C for a 62 mm thick weld was found inferior in comparison with a 30 mm thick weld.","PeriodicalId":23605,"journal":{"name":"Welding International","volume":"37 1","pages":"185 - 205"},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47236531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation of rotary friction welding on the mechanical properties of NiTinol alloy 旋转摩擦焊接对镍钛诺合金力学性能的试验研究

Welding International Pub Date : 2023-04-03 DOI: 10.1080/09507116.2023.2202343

Shashikala A, Muniraju M, Pakkirappa H

引用次数: 0

Simulation of dissimilar friction stir welding of AA7075 and AA5083 aluminium alloys using Coupled Eulerian–Lagrangian approach 采用耦合欧拉-拉格朗日方法模拟AA7075和AA5083铝合金异种搅拌摩擦焊接

Welding International Pub Date : 2023-04-03 DOI: 10.1080/09507116.2023.2205035

M. Akbari, Hossein Rahimi Asiabaraki, Ezatollah Hassanzadeh, M. Esfandiar

{"title":"Simulation of dissimilar friction stir welding of AA7075 and AA5083 aluminium alloys using Coupled Eulerian–Lagrangian approach","authors":"M. Akbari, Hossein Rahimi Asiabaraki, Ezatollah Hassanzadeh, M. Esfandiar","doi":"10.1080/09507116.2023.2205035","DOIUrl":"https://doi.org/10.1080/09507116.2023.2205035","url":null,"abstract":"Abstract Temperature, strain and material flow during the friction stir welding (FSW) process are factors that determine the quality of the resulting joint. Examining these features by experimental methods is very difficult, so the numerical method is developed. This paper focuses on simulating the FSW of AA5083 to AA7075 aluminium alloys. At first, in order to investigate the materials mixing and also to study the microstructural properties and hardness of the samples, the samples were welded using a milling machine. Then, according to the used parameters, the process was modelled. For this reason, a Coupled Eulerian–Lagrangian (CEL) was employed to estimate thermal, strain and material mixing. Comparing the stir zone (SZ) of the joint produced and predicted by simulation revealed that the CEL approach has well-determined the material mixing in the SZ. The experimental results show that the highest hardness value is 112 HV in the thermo-mechanically affected zone of AA7075 alloy. The numerical results indicate an unequal strain distribution along the weld centre line due to the lower strength of AA5083 and a ‘positive’ interaction between the tool welding and rotational speed on the advancing side.","PeriodicalId":23605,"journal":{"name":"Welding International","volume":"37 1","pages":"174 - 184"},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49094573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Microstructural studies and parametric optimization of dissimilar friction stir welds 不同搅拌摩擦焊缝的显微组织研究及参数优化

Welding International Pub Date : 2023-04-03 DOI: 10.1080/09507116.2023.2211283

Yash Dugar, Nishant Singh, Ajit Kumar, Gowtham Vinayagamurthy, Shanmuganatan S P, Madhusudan M

引用次数: 1

A parametric study on weld zone shape of resistance spot welded 22MnB5 steel 电阻点焊22MnB5钢焊接区形状的参数研究

Welding International Pub Date : 2023-03-04 DOI: 10.1080/09507116.2023.2200152

Oğuz Tunçel, Hakan Berk Aydın, Alisan Gonul

{"title":"A parametric study on weld zone shape of resistance spot welded 22MnB5 steel","authors":"Oğuz Tunçel, Hakan Berk Aydın, Alisan Gonul","doi":"10.1080/09507116.2023.2200152","DOIUrl":"https://doi.org/10.1080/09507116.2023.2200152","url":null,"abstract":"Abstract The resistance spot welding of 22MnB5 with different weld currents, weld times, and quenching conditions is investigated in the current study. A Kriging Response Surface Methodology-based local sensitivity analysis is performed to investigate the effect of weld current, weld time, and quench condition on weld zone morphology and tensile shear load (TSL). When welding current, welding time, and quenching conditions are varied between the minimum and maximum values, the geometry of the weld zone was influenced by 40–60%, 20–40%, and 0–20%, respectively, according to sensitivity studies. It is also found that increasing values of welding current are the most effective welding parameter, increasing TSL by about 45%. In order to better understand the TSL variation at different welding parameters, various hardness measurements are applied for each specimen in the fusion zone and the heat-affected zone (HAZ) regions of the weld zone. Based on the location, the HAZ was divided into three regions: the inner, middle, and outer. The middle HAZ had hardness values 12% higher than the base material, while the outer HAZ had hardness values up to 36% lower than the base material. Also, macro-and microstructure images of the sample produced by combining the quenched and non-quenched materials are obtained to demonstrate how the hardness zones are identified.","PeriodicalId":23605,"journal":{"name":"Welding International","volume":"37 1","pages":"142 - 153"},"PeriodicalIF":0.0,"publicationDate":"2023-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43952957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-criteria optimization of TIG welding process parameters on AISI 409M stainless steel by Grey Taguchi method 采用灰色田口法对AISI 409M不锈钢TIG焊接工艺参数进行多准则优化

Welding International Pub Date : 2023-03-04 DOI: 10.1080/09507116.2023.2198658

Angshuman Roy, N. Ghosh, S. Mondal

引用次数: 0

Optimization of process parameters of ultrasonic metal welding for multi layers foil of AL8011 material AL8011材料多层箔超声金属焊接工艺参数优化

Welding International Pub Date : 2023-03-04 DOI: 10.1080/09507116.2023.2192373

Shah Samir, K. Dave, V. Badheka, D. Patel

引用次数: 2

Formulation of effective thickness for predicting CTOD value of heavy thickness plates using reduced thickness CTOD specimens 用减薄CTOD试样预测厚板CTOD值的有效厚度公式

Welding International Pub Date : 2023-03-04 DOI: 10.1080/09507116.2023.2193517

Yoshifumi Takaki, T. Sakimoto, T. Handa, S. Igi

{"title":"Formulation of effective thickness for predicting CTOD value of heavy thickness plates using reduced thickness CTOD specimens","authors":"Yoshifumi Takaki, T. Sakimoto, T. Handa, S. Igi","doi":"10.1080/09507116.2023.2193517","DOIUrl":"https://doi.org/10.1080/09507116.2023.2193517","url":null,"abstract":"Abstract Demand for heavy thickness plate is increasing in offshore structure application and fracture toughness represented by CTOD is one of the most important properties for these heavy thickness plate. CTOD tests shall be conducted as full thickness of the material but it takes a lot of time and cost, especially with the thickness exceeds 100 mm. It is important to estimate the CTOD of full thickness plate using reduced thickness CTOD tests to accelerate material development in the laboratory. As a conventional estimating method for full thickness CTOD using the reduced thickness CTOD test, only the difference of crack driving force between full thickness and reduced thickness specimens have been considered. However, it is necessary to consider crack driving force in plate thickness direction for full thickness and reduced thickness specimens. As the first step, the influence of parameters on effective thickness considering crack driving force in plate thickness direction for the base metal is investigated in this study. Finally, the formulation of effective thickness is proposed on the base of the influential parameters.","PeriodicalId":23605,"journal":{"name":"Welding International","volume":"37 1","pages":"154 - 162"},"PeriodicalIF":0.0,"publicationDate":"2023-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47142654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pulsed thermo-induction-dynamic welding and pressing of dissimilar materials 异种材料的脉冲热感应动态焊接与冲压

Welding International Pub Date : 2023-03-04 DOI: 10.1080/09507116.2023.2196452

S. Nescoromniy, Evgeniy Strizhakov

{"title":"Pulsed thermo-induction-dynamic welding and pressing of dissimilar materials","authors":"S. Nescoromniy, Evgeniy Strizhakov","doi":"10.1080/09507116.2023.2196452","DOIUrl":"https://doi.org/10.1080/09507116.2023.2196452","url":null,"abstract":"Abstract To obtain permanent joints from diversified parts and powder compositions, it is proposed to use discharge-pulse processes with the accumulation of stored energy in a capacitor bank. Technological difficulties in the manufacture of structures from non-ferrous metal and alloy parts of different thicknesses are listed. The thermal effect is carried out by passing the discharge current from the batteries of pulse capacitors, and the power effect is realized through the use of an inductive-dynamic drive. A scheme for the series connection of a compacted powder with an induction-dynamic drive, consisting of a flat inductor with a pusher, is proposed. The physical essence of the formation of compounds is described. The processes responsible for the formation of permanent connections by a pulsed current discharge have been identified. A picture of the relationship between the main parameters of the pressing process – sintering in time, as well as the results of measuring the temperature of the sintering process of powders by the photoemission method is presented. The results of energy consumption for the consolidation of powder compositions with simultaneous welding to a steel base are given.","PeriodicalId":23605,"journal":{"name":"Welding International","volume":"37 1","pages":"128 - 134"},"PeriodicalIF":0.0,"publicationDate":"2023-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42172916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 thermomechanical treatments on the microstructure and mechanical properties of AISI 304L welds 热机械处理对AISI 304L焊缝组织和力学性能的影响

Welding International Pub Date : 2023-02-01 DOI: 10.1080/09507116.2023.2182728

Peng Wang, Bartlomiej Szalowski, R. Vallant, C. Poletti, N. Enzinger

{"title":"Influence of thermomechanical treatments on the microstructure and mechanical properties of AISI 304L welds","authors":"Peng Wang, Bartlomiej Szalowski, R. Vallant, C. Poletti, N. Enzinger","doi":"10.1080/09507116.2023.2182728","DOIUrl":"https://doi.org/10.1080/09507116.2023.2182728","url":null,"abstract":"Abstract A thermomechanical welding (TMW) process is proposed to improve the overall quality of TIG welds by minimizing extensive grain growth or even promoting a fine-grained microstructure. In this study, the welding substrates are tested in three different conditions: as-received (hot-rolled) and cold-rolled with 25% and 50% thickness reduction of AISI 304L plates. The pneumatic hammer is operated with 6 bar pressure and 35 Hz frequency. The results show that the frequent hammering induced two types of vibration on the welds: a) a mechanical vibration and b) the vibration of the TIG arc. Both vibrations combined with the plastic deformation in the solid state refined the solidified microstructure of the fusion zone (FZ), characterized by fine vermicular δ-ferrite with relatively small content. The TIG arc vibration also enlarged the depth of the FZ. Higher hardness was measured on the TMW welds when comparing with the TIG welds without subsequent hammering. The mean grain size of the heat-affected zone (HAZ) was smaller for the material in the cold-rolled condition than in the as-received condition due to martensite reversion and static recrystallization. It is concluded that the proposed TMW process could refine the fusion zone microstructure and hence enhance its mechanical property.","PeriodicalId":23605,"journal":{"name":"Welding International","volume":"37 1","pages":"79 - 90"},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43298006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0