Materials Testing最新文献_第7页

Effects of different profiled pins used in friction stir welding of Al 6061 T6 不同型销对Al 6061 T6搅拌摩擦焊的影响

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-08-23 DOI: 10.1515/mt-2023-0173

Emine Gündoğdu İş, Kadir Koçak, Zeynep Sueda Basar, Yağızer Yavuz, P. Topuz

引用次数: 0

Finite element analysis of bending and torsional loading of two different endodontic rotary files with different off-center geometric sections 两种不同偏离中心几何截面根管旋转锉的弯曲和扭转载荷有限元分析

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-08-22 DOI: 10.1515/mt-2023-0070

Mehmet Eskibağlar, Serkan Erdem, M. O. Kaman, M. Ocak

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Effect of pack characteristics and process parameters on the properties of aluminide-coated Inconel 625 alloy 包覆特性和工艺参数对镀铝Inconel 625合金性能的影响

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-08-21 DOI: 10.1515/mt-2023-0125

Ş. Atapek, Cüneyt Koray Gencay, T. Yener, F. Kahriman, G. Çelik

{"title":"Effect of pack characteristics and process parameters on the properties of aluminide-coated Inconel 625 alloy","authors":"Ş. Atapek, Cüneyt Koray Gencay, T. Yener, F. Kahriman, G. Çelik","doi":"10.1515/mt-2023-0125","DOIUrl":"https://doi.org/10.1515/mt-2023-0125","url":null,"abstract":"Abstract In this study, Inconel 625 alloy was initially aluminide coated by halide-activated pack cementation at 700 °C for 4 h using fine (40–45 µm) globular and coarse (10–75 µm) ligament aluminum particles. Microstructural features and hardness variation of the coatings along with their oxidation behavior at 1000 °C during 50 h were investigated to reveal the effect of pack characteristics on the properties. Investigations revealed that (i) a homogeneous and continuous coating layer was formed on the surface without internal oxidation, (ii) a thicker coating (∼60 µm) was formed due to the pack consisting of coarse particles, (iii) a higher hardness value (1369 HV0.5) was measured for the coated alloy using fine particles in the pack, and (iv) the coating with coarse powder exhibited higher oxidation resistance during the first 50 h of oxidation test period. Secondly, superalloy was coated at different temperatures (700 and 1000 °C) and times (2 and 4 h) using coarse particles. In this stage, the findings showed that by increasing process temperature and time, the accumulation of aluminum on the superalloy surface increased and the oxidation tendency remained at a lower level in coatings containing thicker layers.","PeriodicalId":18231,"journal":{"name":"Materials Testing","volume":"14 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87605891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 tool plunging rate on mechanical properties and microstructure of friction stir welded DMR249A high strength low alloy (HSLA) steel butt joints 刀具跌落速率对搅拌摩擦焊接DMR249A高强度低合金(HSLA)钢对接接头力学性能和组织的影响

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-08-21 DOI: 10.1515/mt-2023-0043

Seerangan Ragu Nathan, V. Balasubramanian, A. Gourav Rao, Tushar Sonar, M. Ivanov, C. Rajendran

{"title":"Influence of tool plunging rate on mechanical properties and microstructure of friction stir welded DMR249A high strength low alloy (HSLA) steel butt joints","authors":"Seerangan Ragu Nathan, V. Balasubramanian, A. Gourav Rao, Tushar Sonar, M. Ivanov, C. Rajendran","doi":"10.1515/mt-2023-0043","DOIUrl":"https://doi.org/10.1515/mt-2023-0043","url":null,"abstract":"Abstract The main aim of this study is to analyse the influence of tool plunging rate on tool wear and stir zone characteristics of DMR249A high strength low alloy (HSLA) steel joints developed using friction stir welding (FSW). The HSLA steel plates were welded at five levels of tool plunging rates varying from 2.0 mm min−1 to 3.0 mm min−1. The tool rotational speed of 600 rpm and welding speed of 30 mm min−1 were kept constant during welding. The wear of FSW tool was analysed by microscopic observations of tool condition after welding, stir zone characteristics, weight loss measurement and pin profile analysis. The characterization techniques of optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to analyse the microstructural characteristics of stir zone of welded joints. Results disclosed that the severe degradation of FSW tool occurred due to the sudden dynamic impact load on tool pin while plunging and more diffusion of work piece material into the tool pin which leads to insufficient plasticized material flow. The tool plunging rate of 2.5 mm min−1 showed minimum tool wear and produced defect free sound joint.","PeriodicalId":18231,"journal":{"name":"Materials Testing","volume":"25 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81281762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

In situ observation and understanding of the arc erosion behavior of electrical contact materials 电接触材料电弧侵蚀行为的现场观察与认识

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-08-18 DOI: 10.1515/mt-2023-0018

Chao Zhang, W. Ren, Zhe Zheng, Jian Liu, Xiu-qin Liu

引用次数: 0

Effects of build orientation and hatch spacing on high-speed milling behavior of L-PBF 316L stainless steel 构建方向和舱口间距对L-PBF 316L不锈钢高速铣削性能的影响

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-08-17 DOI: 10.1515/mt-2023-0210

Gürkan Kaya, U. Köklü, T. O. Ergüder, Furkan Cengiz, F. Yıldız

{"title":"Effects of build orientation and hatch spacing on high-speed milling behavior of L-PBF 316L stainless steel","authors":"Gürkan Kaya, U. Köklü, T. O. Ergüder, Furkan Cengiz, F. Yıldız","doi":"10.1515/mt-2023-0210","DOIUrl":"https://doi.org/10.1515/mt-2023-0210","url":null,"abstract":"Abstract Due to the philosophy of the process, the surface roughness is usually high for the parts produced with laser powder bed fusion (L-PBF) additive manufacturing (AM). Parts produced by this method need surface quality improvement processes for many applications. One of the methods used for this purpose is high speed machining (HSM). HSM is a modern manufacturing technique that offers several benefits, including improved productivity, enhanced product quality, and reduced production costs. In addition, HSM can improve the quality of finished products by reducing machining errors. In this study, samples produced with 316L powder in size of 10 × 10 × 5 mm using three different hatch spacings (60, 70, 80 µm) and building orientations (0°, 45°, 90°) were produced by L-PBF method, and HSM process was applied to these samples. In this context, the present study aimed to investigate the effects of porosity, microstructure and microhardness properties of 316L samples produced by L-PBF method using different hatch spacings and build orientations on cutting forces, surface roughness and burr formation in HSM. When the numerical values of the cutting forces were analyzed in both x and y directions, it was observed that the greatest cutting force occurred in the x direction. While the Fx force ranged from 6.23 to 9.35 N, the Fy force ranged from 4.88 to 8.27 N. It has been determined that as the build orientation increases at the same hatch spacing value, the cutting forces increase due to the increased porosity ratio.","PeriodicalId":18231,"journal":{"name":"Materials Testing","volume":"31 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77325161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Effect of Ti3O5 addition on oxide evolution for HRB400 Ti3O5添加对HRB400氧化演化的影响

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-08-15 DOI: 10.1515/mt-2023-0141

Hui Li, Xiang Cheng, Yuhui Zhao, H. Kong

引用次数: 0

Round bar notch shape optimization for tensile stress concentration testing 拉伸应力集中测试的圆棒缺口形状优化

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-08-15 DOI: 10.1515/mt-2023-0062

M. Ozsoy, T. Akşen, S. Ekşi, Neslihan Ozsoy, M. Firat

引用次数: 0

Analysis of tool wear and surface roughness in machining of AISI 4462 duplex stainless steel AISI 4462双相不锈钢加工中刀具磨损及表面粗糙度分析

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-08-14 DOI: 10.1515/mt-2023-0045

Fikret Sönmez

引用次数: 0

Microstructural and numerical variation of friction spot welded AA7075 couples 摩擦点焊AA7075偶的显微组织及数值变化

IF 2.5 4区材料科学

Materials Testing Pub Date : 2023-08-14 DOI: 10.1515/mt-2023-0142

F. Sarsılmaz, Büşra Gürocak Çelik

{"title":"Microstructural and numerical variation of friction spot welded AA7075 couples","authors":"F. Sarsılmaz, Büşra Gürocak Çelik","doi":"10.1515/mt-2023-0142","DOIUrl":"https://doi.org/10.1515/mt-2023-0142","url":null,"abstract":"Abstract Friction stir spot welding (FSSW), which is one of the joining methods, is an interesting solid state joining process. In this experimental study, the joining of AA7075, which is the one of the Al-based alloys, with the FSSW method was conducted. Firstly, the microstructural inspections were performed by helping an optical microscope. Second, a numerical simulation study was performed using SolidWorks and ANSYS software. Therefore, these data were evaluated with modeling for understanding the events in zone of FSSW center. Thus, it could be contributed to understand the complex thermo-mechanical joining process period. The present simulation primarily aims to explain the effect of a set of process such as parameters and tool geometry on the workpiece couples. Johnson–Cook damage criteria model was selected to obtain the stress distribution on the workpiece couples consisting of AA7075. The model also showed that temperature and stress did not exhibit much appreciable change on flow with the change of the tip profile. As a result, it was found that tool rotation speed and tool plunge depth are highly effective on both microstructure and numerical modeling properties, apart from the tool geometry, which is one of the welding parameters.","PeriodicalId":18231,"journal":{"name":"Materials Testing","volume":"30 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78228639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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