Technologies for obtaining micro and nanostructured materials; Physical metallurgy II; Physical metallurgy I.
Scientific Area
Materials Engineering
Job Description
Associate Professor, pos.7, discipline: Technologies for obtaining micro and nanostructured materials; Physical metallurgy II; Physical metallurgy I.
Related duties / activities
- didactic activities;
– courses, laboratory works, design; guidance practical activity;
- supervision of graduate and postgraduate dissertations;
- students mentoring, student consultations; - member of commissions in the interest of education;
- supervision of student scientific workshops;
- methodical and scientific training;
- scientific research (activities within the research centers, writing of monographs, books and articles)
Minimum wage for classification
4807 lei
Calendar of the job application contest
Announcement publication date in the Official Monitor
2019-11-26
Registration period
Begin
End
2019-11-26
2020-01-15
Date of the lecture
2020-01-31
Time of the lecture
11:00:00
Place for the lecture
Faculty of Engineering, Room AN203.
Examination period
Begin
End
2020-01-30
2020-02-02
Results communication period
Begin
End
2020-02-03
2020-02-03
Results appeal period
Begin
End
2020-02-03
2020-02-07
Job application contest topics
Technologies for obtaining micro and nanostructured materials
1. Ultrafine grained and nanocrystalline materials. Applications of nanomaterials. 2. Classification and properties of nanoscale materials. Properties of nanoparticles. The effect of the quantum size on the properties of nanoparticles. The effect of the ratio of surface atoms to interior atoms. The behavior of bulk metallic nanostructures (3D). Behavior of ferromagnetic nanostructures. Soft magnetic nanocrystalline alloys. Hard magnetic materials for permanent magnets. Giant magnetoresistance. Nanocrystalline materials for hydrogen storage. Corrosion-resistant of nanocrystalline materials. 3. Synthesis of nanomaterials. Methods for the nanomaterials synthesis and the nanostructures manufacture. Techniques for synthesis and consolidation of gas-phase nanoparticles. Techniques for synthesis and consolidation of liquid phase nanostructures. Techniques for synthesis and consolidation of solid-phase nanostructures. 4. Overview of severe plastic deformation. The grain refinement obtained by SPD techniques. SPD techniques based on equal channels angular pressing. High pressure torsion based SPD techniques. SPD techniques based on direct / indirect extrusion. SPD techniques based on pressing / forging. SPD techniques based on rolling. Combined SPD techniques. 5. Grain refinement mechanisms by severe plastic deformation. Mechanisms of refining structure in the case of crystalline structures of type CVC and HC. The minimum grain size obtained by SPD and subsequent growth of the grain size. Mechanisms of grain refinement by ECAP, HPT, forging and rolling processes. 6. Equal channel angular pressing - ECAP. Principle of ECAP. The processing routes in the ECAP process. The strain imposed in the ECAP process. Experimental factors influencing ECAP. Processing pure metals, metallic alloys and composites by ECAP. Texture, strength and ductility after ECAP. 7. Severe plastic deformation by accumulative roll-bonding-ARB. Principle and grain refinement of ARB. A comparison of traditional rolling and ARB. Factors that influence the ARB process. Mechanical properties of materials subjected to ARB process. Pure metals, metallic alloys and composites processed by ARB. 8. Severe plastic deformation by HPT method. Principle of the HPT. The influence of the various factors on the microstructure and homogeneity across an HPT disk. Principles of HPT in the processing of pure metals, metallic alloys and composites. Superplasticity properties obtained in metals by HPT. Severe plastic deformation by friction stir welding. Severe plastic deformation by HSHPT technique. Principle of the HSHPT technique. Shape memory alloys based on Fe, Cu and Ni deformed by HSHPT. Magnetic shape memory alloys. Multilayer nanocomposites processed by HSHPT.
Physical Metallurgy I
1. Introduction. Correlation between chemical composition, processing conditions, structure and properties of materials. Types of materials: metals, ceramics, polymers, composites, nanocrystalline and multifunctional materials. Properties of materials. 2. Materials structure and organization. The structure of crystalline and amorphous solids. Crystal systems, crystallographic points, directions and planes. Characterization of crystalline metal structures. Metallic crystal structures: the face-centered cubic crystal structure, the body-centered cubic crystal structure and the hexagonal close-packed crystal structure. Polymorphism and allotropy. 3. Imperfections in solids. Structure of Real crystals. Point defects. Dislocations-linear defects. Interfacial defects. Grain boundaries. Phase boundaries. Twin boundaries. 4. Constitution of metallic materials. Phase constituents of metallic materials: solid solutions, substitution solid solutions, ordered solid solutions, interstitial solid solutions, intermetallic compounds. Metallographic constituents: pure metal, solid solution, intermetallic compound, mechanical mixture. Non-metallic inclusions. 5. Metallic materials solidification. Thermodynamic conditions and mechanism of crystallization. Homogeneous and Heterogeneous nucleation processes. The processes of crystal growth. Kinetics of crystallization. Characterization of the primary structure obtained by solidification. Phenomena related to the solidification. 6. Diffusion. Introduction. The diffusion couple. Diffusion mechanisms. Diffusion laws Steady-state diffusion. Nonsteady-state diffusion.7. Phase equilibrium diagrams. Phase equilibria. The lever and Gibbs phase rule. Interpretation of phase diagrams. Binary phase diagrams. General aspects. Microstructure in isomorphs alloys. Equilibrium and non-equilibrium cooling. The Cu-Ni system example. Dendritic segregation. Alloy systems with total insolubility in liquid and solid state. The equilibrium phase diagram with totally soluble components in liquid state and insoluble in solid state. The Bi – Cd system obtained by thermal analysis. Practical use of eutectic equilibrium diagrams. Phase diagram with fully soluble components in liquid state, partially soluble in solid state and eutectic reaction. Equilibrium diagram with fully soluble components in liquid state, partially soluble in solid state and peritectic reaction. Intermediate compounds phase diagrams. Congruent phase transformation. Equilibrium diagram with solid solution based on the congruent melting compound AmBn. Incongruent phase transformation. Equilibrium diagram with insoluble components in solid state and monotectic reaction. Phase diagram with insoluble components in solid state and synthetic reaction. Equilibrium diagram with solubility of components in solid state, temperature variable. Phase diagram for components with allotropic transformations. The equilibrium diagram in which the components exhibit allotropic transformations and eutectoid reaction. Equilibrium diagram with allotropic transformations and peritectoid reaction. Phase diagrams with transformations in the solid solution. Correlation phase diagram and- physical, mechanical and technological properties. Ternary phase diagrams. 8. Mechanical properties of metals. Plastic deformation of metallic materials. Slip in single crystals Mechanisms of plastic deformation of and polycrystalline materials. Hardening and anisotropy. Cold and hot plastic deformation. Recovery, recrystallization and grain growth. Failure. Fatigue. Creep behavior.
Physical metallurgy II
1. The iron-carbon system. Pure iron. Iron - carbon alloys. Iron-iron carbide (Fe-Fe3C) metastable phase diagram. Crystallization of steel and white iron. Quantitative determinations on the Fe-Fe3C diagram. Carbon steels. The influence of carbon on the mechanical properties of steels. The influence of the permanent accompanying elements. The destination and symbolization of carbon steel. White cast iron. Stable iron-graphite (Fe-C) phase diagram. Crystallization of ferritic, perlitic, ferrito-perlitic cast iron (grey iron, ductile iron, malleable iron). Crystallization of mottled cast iron. Phosphorus cast iron. The influence of the chemical composition and the cooling rate on the structure and properties of the cast iron. Ductile (nodular) iron. Malleable iron. The destination and symbolization of cast iron. 2. Phase transformations in solid state. Critical points. The pearlite - austenite transformation. Austenite - pearlite transformation. The austenite - bainite transformation. The austenite - martensite transformation. Isothermal transformation diagram and continuous cooling transformation diagrams. The martensite - pearlite transformation. The main heat treatments applied to steels. Methods of modelling the phase transformations in solid state. Design of heat treatment technologies applied to steels. 3. The influence of other alloying elements. Classification of alloyed steels. The influence of the alloying elements on the polymorphism of iron. The influence of the alloying elements on the properties of the ferrite. The influence of the alloying elements on the points A1, S and E. The influence of the alloying elements on the transformation on speed transformation of the austenite and the shape of the TTT diagram. The influence of the alloying elements on the transformation of martensite to heating. Mn steels, Ni steels, Cr steels. Stainless steel. The Schaeffler diagram. The refractory steels. Materials used at negative temperatures. 4. Nonferrous. Aluminum, copper magnesium, zinc, titanium and their alloys.
Currently there is no application contest files for this post.
Job application contest procedures
See articles 22 to 48 of the Teaching and Research Methodology of Dunărea de Jos University of Galaţi 2018
Currently there is no application contest procedures files for this post.
List of documents
APPLICATION FILE FOR TEACHING AND RESEARCH VACANCIES LIST OF COMPULSORY DOCUMENTS - application form signed by the candidate; - affidavit regarding the authenticity of the documents contained in the file; - applicant's proposal for academic career development; - applicant’s curriculum vitae, in hard copy and electronic copy; - applicant’s list of published papers, in hard copy and electronic copy; - checklist for fulfilment of specific standards of Dunarea de Jos University for participating in the selection procedure. The checklist is filled in and signed by the candidate. - notarised copy of doctoral diploma and, in case the doctoral degree was obtained abroad, the recognition or equivalence certificate thereof by the Romanian State (delivered by the or in accordance with the procedure of the Ministry of Education, Research, Youth, and Sports); - abstract, in Romanian and an international language, of the doctoral dissertation or, as the case may be, of the ‘habilitation’ thesis, of no more than one page for each version; - affidavit by the applicant indicating the lack of incompatibility situations provided by Law No. 1/2011 in case the applicant is declared successful; - if applying for a position of Professor, a notarised copy of the ‘habilitation’ certificate; - notarised copies of medical titles (for medical higher education); - copies of other diplomas: Baccalaureate diploma or recognition certificate, Bachelor of arts diploma or recognition certificate, academic records or Diploma Supplement, as the case may be; - notarised copies of other diplomas attesting the applicant’s level of education; - copy of identity card, passport or equivalent; - notarised copy of Birth Certificate; - notarised copies attesting name change – marriage certificate or proof of name change; - fee payment receipt as established by the University Senate; - maximum 10 publications, patents or other papers of the applicant, in electronic copy, selected by the applicant as being the most relevant for his/her professional achievements.
Address for the job applications
Registry "Dunărea de Jos" University of Galaţi, Domnească str., no. 47, 800 008, Galaţi
B. Conf. poz.7, Dep.Stiinta si ingineria materialelor
Members:
Preşedinte:
Prof. univ. dr. ing. Marian Bordei - Universitatea „Dunărea de Jos” din Galați
Membri:
Prof. univ. dr. ing. Leandru Bujoreanu - Universitatea Tehnică „Gheorghe Asachi” Iaşi
Prof. univ. dr. ing. Mircea Țierean - Universitatea Tehnică „Transilvania” din Braşov
Prof. univ. dr. ing. Vasile –Dănuț Cojocaru - Universitatea „Politehnica” din Bucureşti
Prof. univ. dr. ing. Tamara Radu - Universitatea „Dunărea de Jos” din Galați
Membri supleanţi:
Prof. univ. dr. ing. Costică Bejinariu – Universitatea Tehnică „Gheorghe Asachi” Iaşi
Conf. univ. dr. ing. Nicoale Șerban - Universitatea „Politehnica” din Bucureşti
