Engineering Steels and High Entropy-Alloys最新文献

Laser Surface Treatment 激光表面处理

Engineering Steels and High Entropy-Alloys Pub Date : 2020-06-24 DOI: 10.5772/intechopen.91800

A. A. Siddiqui, A. K. Dubey

引用次数: 1

Morphology Evolution of DF2 (AISI-O1) Surface Micromachined by Pulsed Nd:YAG Laser 脉冲Nd:YAG激光微加工DF2 (AISI-O1)表面的形貌演变

Engineering Steels and High Entropy-Alloys Pub Date : 2020-06-24 DOI: 10.5772/intechopen.89189

K. Guo

引用次数: 0

Phase Transformation in Micro-Alloyed Steels 微合金钢的相变

Engineering Steels and High Entropy-Alloys Pub Date : 2020-05-20 DOI: 10.5772/intechopen.91468

F. Khan, H. Rashed

{"title":"Phase Transformation in Micro-Alloyed Steels","authors":"F. Khan, H. Rashed","doi":"10.5772/intechopen.91468","DOIUrl":"https://doi.org/10.5772/intechopen.91468","url":null,"abstract":"Phase transformation in crystalline solid is an important factor that designs the microstructure and plays a great role in alloy development. Iron has an allotropic form, and this unique metallurgical property leads to phase transformation. Addition of micro-alloying elements enhances the phase transformation scenarios in steels. Phase transformation due to the addition of micro-alloying elements, together with exceptional precipitation hardening capabilities, substantially improves mechanical properties of steels of different grades. Ferrite transforming to other phases reduces the hardenability of steels. Micro-addition of elements forms precipitation in ferrite and austenite, which controls the microstructure and hence the mechanical properties of steels. Besides, interactions between different deformation sequences used in the production of steel and addition of elements as solute or precipitates regulate the microstructure. Ferrite grain refinement depends on the refinement of austenite grain size in one case, and austenite grain size growth can be varied by addition of various elements. Thus, a variety of elements influences phase transformation that leads to significantly modified properties.","PeriodicalId":342991,"journal":{"name":"Engineering Steels and High Entropy-Alloys","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128754918","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

High-Entropy Alloys for Micro- and Nanojoining Applications 用于微纳米连接的高熵合金

Engineering Steels and High Entropy-Alloys Pub Date : 2020-04-06 DOI: 10.5772/intechopen.91166

Ashutosh Sharma

引用次数: 7

Technologies of High-Temperature Insulating Coatings on Stainless Steels 不锈钢高温绝缘涂层技术

Engineering Steels and High Entropy-Alloys Pub Date : 2020-02-19 DOI: 10.5772/intechopen.91334

Z. Duriagina, T. Kovbasyuk, V. Kulyk, A. Trostianchyn, T. Tepla

引用次数: 1

Development of Lightweight Steels for Automotive Applications 汽车用轻钢的发展

Engineering Steels and High Entropy-Alloys Pub Date : 2020-02-14 DOI: 10.5772/intechopen.91024

M. Tisza

{"title":"Development of Lightweight Steels for Automotive Applications","authors":"M. Tisza","doi":"10.5772/intechopen.91024","DOIUrl":"https://doi.org/10.5772/intechopen.91024","url":null,"abstract":"The automotive industry plays a determinant role in the economy of developed countries. Sheet metal forming is one of the most important processes in car manufacturing. Recent trends in car production may be characterized by the application of lightweight principles. Its main priority is to fulfill both the customers’ demands and the increased legal requirements. The application of high strength steels may be regarded as one of the potential possibilities. Applying high strength steels has a positive response for many of the requirements: increasing the strength may lead to the application of thinner sheets resulting in significant mass reduction. Mass reduction is leading to lower consumption with increased environment protection. However, increasing the strength can often lead to the decrease of formability, which is very unfavorable for the forming processes. In this chapter, an overview of recent material developments in the automotive industry concerning the use of new-generation high strength steels will be given. In this paper, the material developments are emphasized from the point of view sheet metal forming; therefore, our focus is on the body-in-white manufacturing in the automotive industry.","PeriodicalId":342991,"journal":{"name":"Engineering Steels and High Entropy-Alloys","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133210969","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: 14

Building and Architecture Paints and Coatings 建筑和建筑油漆和涂料

Engineering Steels and High Entropy-Alloys Pub Date : 2019-12-27 DOI: 10.5772/intechopen.90498

V. Loganina, Y. B. Mazhitov

{"title":"Building and Architecture Paints and Coatings","authors":"V. Loganina, Y. B. Mazhitov","doi":"10.5772/intechopen.90498","DOIUrl":"https://doi.org/10.5772/intechopen.90498","url":null,"abstract":"Information is given on the strength of the coatings of cement concrete for the exterior walls of buildings. It was found that the strength of the coating depends on the quality of its appearance. A strength model is proposed depending on the surface roughness of the coating. The influence of the scale factor on the change in the strength of coatings is established. To assess the long-term strength of the coatings, we studied the temperature-time dependence of strength. The values of the activation energy of the destruction process of some coatings are experimentally determined. The dependence of the long-term strength of the coatings on tensions is given. The kinetics of changes in the short-term strength of coatings during aging is considered from the perspective of the kinetic concept of the strength of solids. The condition for coating cracking is obtained. Taking into account the influence of the scale factor and the conditions of brittle fracture of coatings, a method for choosing the optimal coating thickness is proposed. paint after 35 cycles is estimated as AD1 and AZ1, which corresponds to the state of coating with no discoloration, chalking, and dirt retention. Silicate-based coatings are more susceptible to degradation. The condition of coating based on silicate paint is estimated as AD3 and AZ3. The test results showed that the “ failure ” of coating based on silicate paint occurred after 40 freeze-thaw cycles, while the state of the coating based on polysilicate solution was evaluated as AD2 and AZ2. The “ failure ” of the coating based on the polysilicate solution occurred after 50 test cycles.","PeriodicalId":342991,"journal":{"name":"Engineering Steels and High Entropy-Alloys","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116269525","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

Isothermal Transformation Behavior and Microstructural Evolution of Micro-Alloyed Steel 微合金钢的等温相变行为及组织演变

Engineering Steels and High Entropy-Alloys Pub Date : 2019-11-18 DOI: 10.5772/intechopen.85900

Sanjeev Kumar

{"title":"Isothermal Transformation Behavior and Microstructural Evolution of Micro-Alloyed Steel","authors":"Sanjeev Kumar","doi":"10.5772/intechopen.85900","DOIUrl":"https://doi.org/10.5772/intechopen.85900","url":null,"abstract":"In this present study, the transformation products in micro-alloyed steel have been examined as well as isothermal decomposition of austenite into various phase formation. The rapid cooling from austenitizing temperature 1200°C to 14 different isothermal temperatures between 750 and 100°C with 50°C intervals were carried out by using dilatometric strain dilatometer on thermo-mechanical simulator. The heat treatments were delayed at different times to examine the microstructure evolution at all isothermal temperatures. The transformation kinetics was recorded during isothermal treatments and designed an isothermal transformation diagram, which is verified by microstructural changes. The results show that the initial microstructure which consists of proeutectoid ferrite and pearlite transforms into a combination of proeutectoid ferrite, pearlite, widmanstätten ferrite, upper or lower bainite, or martensite phases. The austenite grain size has been found to be decreased with a decrease in the isothermal holding temperature. The nose temperature was achieved at isothermal temperature 500°C which have been taking the least time for start and end of transformation of phases. It is also worth noticing that the start and end transformation times were observed decreasing with a decrease in the isothermal holding temperatures and after the nose transformation again gradually increased.","PeriodicalId":342991,"journal":{"name":"Engineering Steels and High Entropy-Alloys","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134219261","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

Integrated Manufacturing of Fine-Grained Stainless Steels for Industries and Medicals 工业和医疗用细晶不锈钢的集成制造

Engineering Steels and High Entropy-Alloys Pub Date : 2019-11-14 DOI: 10.5772/intechopen.89754

T. Aizawa, T. Shiratori, T. Komatsu

{"title":"Integrated Manufacturing of Fine-Grained Stainless Steels for Industries and Medicals","authors":"T. Aizawa, T. Shiratori, T. Komatsu","doi":"10.5772/intechopen.89754","DOIUrl":"https://doi.org/10.5772/intechopen.89754","url":null,"abstract":"Austenitic stainless steels have been widely utilized in industries, infrastruc-tures, housing structures, kitchen components, and medical tools. Higher hardness and strength as well as more improvement of wear and corrosion toughness are often required in the industrial and medical applications. Fine-grained stainless steel (FGSS) provides a solution to increase the strength without loss of ductility and toughness. Deeper research and development in manufacturing of FGSS is required to make full use of its properties toward its applications in industries and medicals. First, its mechanical properties and microstructure is introduced as a basic knowledge of FGSS with comparison to the normal stainless steels. Mechanical and laser machinability of FGSS is stated and discussed to finish the products in seconds. Its performance in metal forming and diffusion bonding is explained to explore its applications in third. Its surface treatment and tooling is discussed to describe the grain-size effect on the low temperature plasma nitriding and to demonstrate its effectiveness in die-making in forth. Finally, every aspect in manufacturing of FGSS sheets and solids is summarized as a conclusion.","PeriodicalId":342991,"journal":{"name":"Engineering Steels and High Entropy-Alloys","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116408204","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: 7

High-Entropy Ceramics 熵值陶瓷

Engineering Steels and High Entropy-Alloys Pub Date : 2019-10-31 DOI: 10.5772/intechopen.89527

S. Alvi, Hanzhu Zhang, F. Akhtar

引用次数: 82