Metallurgical and Materials Engineering最新文献_第6页

Water hyacinth (EichhorniaCrassipes) polymer composites properties - aquatic waste into successful commercial product 水葫芦(EichhorniaCrassipes)高分子复合材料的性能-将水产废弃物转化为成功的商业产品

Metallurgical and Materials Engineering Pub Date : 2022-03-25 DOI: 10.30544/752

Ajithram Arivendan, Winowlin Jappes J T, Siva Irulappasamy, Brintha N Chris

{"title":"Water hyacinth (EichhorniaCrassipes) polymer composites properties - aquatic waste into successful commercial product","authors":"Ajithram Arivendan, Winowlin Jappes J T, Siva Irulappasamy, Brintha N Chris","doi":"10.30544/752","DOIUrl":"https://doi.org/10.30544/752","url":null,"abstract":"In modern times, the demand for natural fibers is increased due to low density, low cost, recyclability, and biodegradable properties. Following work deals with the aquatic waste of water hyacinth plant fiber. The main intent of this work is to utilize the hyacinth plant into a successive manner and convert this plant into some commercial products. It is used as reinforcement material and epoxy polymer resin in matrix material with a suitable percentage of hardener (10:1). A new method such as a mechanical way of extraction process is introduced in this work. The different weight percentage of the hyacinth fiber is reinforced with matrix material like 15, 20, 25, 30, and 35%. With the help of a compression molding, machine water hyacinth reinforced fiber composite is produced by using 1500 PSI pressure and 110 °C, 100 °C of upper and lower plate temperature. A composite sample is cut into as per ASTM standards and the mechanical tests like tensile, flexural, impact test is conducted by using universal testing machine (UTM), and Charpy impact test machine. Based on the final mechanical test results, the 30% of hyacinth composite sample tensile 36.48 MPa, flexural 48.62 MPa, impact 0.5 J, and hardness 98 attained then, the hyacinth composite samples are adopted into water and chemical absorption test with 10 hours, 1week, 1month of continuous monitoring. Based on the final results, hyacinth fiber is strongly recommended to use an alternative of synthetic fibers and conventional natural fibers. The hyacinth composite is strongly recommended for the usage of commercial and household applications.","PeriodicalId":18466,"journal":{"name":"Metallurgical and Materials Engineering","volume":"81 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86433883","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: 1

Numerical investigation of residual stresses in welded joints of cylindrical shell 圆柱壳焊接接头残余应力的数值研究

Metallurgical and Materials Engineering Pub Date : 2022-03-12 DOI: 10.30544/722

Veeresh B R, S. R, Gowreesh S S

{"title":"Numerical investigation of residual stresses in welded joints of cylindrical shell","authors":"Veeresh B R, S. R, Gowreesh S S","doi":"10.30544/722","DOIUrl":"https://doi.org/10.30544/722","url":null,"abstract":"Welded cylinder structures such as pressure vessels and pipes for transportation have been applied in power stations, aerospace, and shipping industries. The study of weld-induced residual stress is vital in predicting the life of welded cylinder vessels. Depending upon the required diameter and length, they are welded by either circumferential welding or longitudinal welding. In the present work, a sequentially coupled thermal, structural analysis is carried out on circumferential and longitudinal butt weld joints of AH-36 cylinder components. The thermal field distribution and subsequent residual stresses during Gas Tungsten Arc Welding (GTAW) are studied. The moving heat source considered for analysis is based upon Goldak’s double ellipsoidal model. The weld-induced axial and hoop stresses are evaluated on both the outer and inner surfaces of the cylinder. The results for circumferential and longitudinal butt weld joints are compared. The magnitude of peak hoop and axial stresses in longitudinal butt weld joints are 45% and 95% higher than in circumferential butt weld joints. The developed analysis model, used to evaluate the thermal histories and residual stresses, is validated with experimental measurements.","PeriodicalId":18466,"journal":{"name":"Metallurgical and Materials Engineering","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91360189","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

Effect of the inclination angle of finned cylinder over a BFS on the MHD behavior in the presence of a nanofluid 在纳米流体存在下，翅片圆柱体在BFS上的倾角对MHD行为的影响

Metallurgical and Materials Engineering Pub Date : 2022-03-12 DOI: 10.30544/760

Djamila Derbal, M. Bouzit, Fayçal Bouzit

引用次数: 1

A study on Morphological and Mechanical Characterization of Al-4032/SiC/GP Hybrid Composites Al-4032/SiC/GP杂化复合材料的形貌和力学性能研究

Metallurgical and Materials Engineering Pub Date : 2022-02-14 DOI: 10.21203/rs.3.rs-232039/v2

D. Kumar, P. Saini, Pradeep K. Singh

引用次数: 5

Effects of temperature and load during hot impression behavior of Cr-Ni stainless steel 温度和载荷对Cr-Ni不锈钢热压印行为的影响

Metallurgical and Materials Engineering Pub Date : 2021-12-28 DOI: 10.30544/745

P. B. Sreevatsava, E. Prasad, A. P. S. Kumar, Mohammad Fayaz Anwar, V. R. Rao, Vanitha Chilamban

{"title":"Effects of temperature and load during hot impression behavior of Cr-Ni stainless steel","authors":"P. B. Sreevatsava, E. Prasad, A. P. S. Kumar, Mohammad Fayaz Anwar, V. R. Rao, Vanitha Chilamban","doi":"10.30544/745","DOIUrl":"https://doi.org/10.30544/745","url":null,"abstract":"Austenitic Stainless steels are majorly used because of their high resistance to aqueous corrosion and high temperature properties. Some major applications of stainless steels at high temperatures include engine and exhaust components in aircrafts, recuperators in steel mills, and pulverized coal injection lances for blast furnaces. In all the above said applications, the components are constantly subjected to loads and high temperatures. This makes the study of their creep behavior very important to decide the life of the component. Cr-Ni stainless steel was used as a starting material, and hot impression creep test was performed on cylindrical samples of 10 mm height and 15 mm diameter for a dwell time of 150 min at two different loads of 84 and 98 MPa and at two different temperatures 450 and 500 °C. The time vs. indentation depth was plotted, and creep rate was calculated in each case. It was observed that with an increase in time, creep rate increased in the primary creep region and remained almost constant in the secondary creep region irrespective of temperature and load. The indentation depth and creep rate increased with an increase in load and temperature.","PeriodicalId":18466,"journal":{"name":"Metallurgical and Materials Engineering","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90437069","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: 2

Static-dynamic model for endpoint control used in Smederevo's BOF shop Smederevo转炉车间端点控制的静态-动态模型

Metallurgical and Materials Engineering Pub Date : 2021-12-28 DOI: 10.30544/716

Tomislav D Bradarić, Z. M. Slović, G. J. Stepanoski, S. Kosanović

引用次数: 1

Algorithm for quantifying the particle size distribution of non-metallic inclusions formation in steel production 钢铁生产中非金属夹杂物粒度分布的量化算法

Metallurgical and Materials Engineering Pub Date : 2021-12-25 DOI: 10.30544/776

M. Mihailović, K. Raić

引用次数: 0

Some advanced welding technologies applied for repair welding in power plants 一些先进的焊接技术在电厂补焊中的应用

Metallurgical and Materials Engineering Pub Date : 2021-12-21 DOI: 10.30544/631

Z. Odanović

{"title":"Some advanced welding technologies applied for repair welding in power plants","authors":"Z. Odanović","doi":"10.30544/631","DOIUrl":"https://doi.org/10.30544/631","url":null,"abstract":"Steels are subjected to many time-dependent degradation mechanisms when they are applied in electric power plants. They are exposed to high temperatures, multi-axial stresses, creep, fatigue, corrosion, and abrasion during such services. Used under these threatening conditions, those materials could develop various damages or failures or even form cracks. Therefore, it is desirable to prevent in-service failures, improve reliability, and extend the plant's operational life. The efficiency of the electric power plant, among other processes, depends on effective maintenance. The paper presents the evaluation of advanced procedures and knowledge in the field of steel repair welding in the maintenance of the power plants. Most repair welding of low alloy steels requires high-temperature post-weld heat treatment (PWHT), but in certain repairs, however, this is not always possible. Application of the nickel-based filler metal could also be an alternative to performing post-weld heat treatment (PWHT). The repair work expenses could be reduced if the repair is performed on-site. The novel developed repair welding procedures presented in this paper were applied for emergency weld repairing of the steel pipelines in thermal power plant, repairing without disassembling the working wheel of the coal mill in thermal power plant and \"on-site\" repairing turbine shaft of the hydropower plant. For all the presented repair welding procedures, weldability analysis based on the analytical equations and technological ''CTS'' and ''Y'' tests to determine the sensitivity to cold and hot crack forming were applied. Tensile tests, absorbed energies tests, banding tests, and hardness measurements were performed on trial joints, which were used to develop and verify the applied methodologies. Presented advanced weld repair technologies enable repairs for a shorter time and at lower costs compared to conventional procedures.","PeriodicalId":18466,"journal":{"name":"Metallurgical and Materials Engineering","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90948781","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

Pulse spray gas metal arc welding of advanced high strength S650MC automotive steel 先进高强度S650MC汽车钢脉冲喷射气体金属电弧焊

Metallurgical and Materials Engineering Pub Date : 2021-12-21 DOI: 10.30544/682

A. Srivastava, P. K. Patra

{"title":"Pulse spray gas metal arc welding of advanced high strength S650MC automotive steel","authors":"A. Srivastava, P. K. Patra","doi":"10.30544/682","DOIUrl":"https://doi.org/10.30544/682","url":null,"abstract":"With an increasing demand for safer and greener vehicles, mild steel and high strength steel are being replaced by much stronger advanced high strength steels of thinner gauges. However, the welding process of advanced high strength steels is not developed at the same pace. The performance of these welded automotive structural components depends largely on the external and internal quality of weldment. Gas metal arc welding (GMAW) is one of the most common methods used in the automotive industry to join car body parts of dissimilar high strength steels. It is also recognized for its versatility and speed. In this work, after a review of GMAW process and issues in welding of advanced high strength steels, a welding experiment is carried out with varying heat input by using spray and pulse-spray transfer GMAW method with filler wires of three different strength levels. The experiment results, including macro-microstructure, mechanical properties, and microhardness of weld samples, are investigated in detail. Very good weldability of S650MC is demonstrated through the weld joint efficiency > 90%; no crack in bending of weld joints, or fracture of tensile test sample within weld joint or heat affected zone (HAZ), or softening of the HAZ. Pulse spray is superior because of thinner HAZ width and finer microstructure on account of lower heat input. The impact of filler wire strength on weldability is insignificant. However, high strength filler wire (ER100SG) may be chosen as per standard welding practice of matching strength.","PeriodicalId":18466,"journal":{"name":"Metallurgical and Materials Engineering","volume":"268 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77805065","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

Application of thermal analysis in ferrous and nonferrous foundries 热分析在黑色及有色金属铸造厂的应用

Metallurgical and Materials Engineering Pub Date : 2021-12-21 DOI: 10.30544/673

M. Djurdjevic

引用次数: 0