Open Access Conference Proceedings

Abstract: Light-weighting targets of the automotive sector requires to use of advanced high-strength steels (AHSS) with higher strength more extensively. However, as a common behavior, increasing strength levels of AHSS accompanied with decreasing ductility/formability levels. [..] Read more

Abstract: Asymmetric cryorolling is a technique that combines the features of asymmetric rolling and cryorolling, and can be used to produce ultrafine grained aluminum sheets. The problem with asymmetric cryorolling is the heat generated in the roll gap by high contact friction and the plastic deformation. [..] Read more

Abstract: Manufacturing steel complex figurine parts remains a fundamental scientific challenge. This article suggests the solution of using hybrid methods that unite processes like combined rolling/stamping, rolling/plastic bending, and asymmetric rolling to produce steel complex figurine parts with wall thickness of 40-100 mm and diameter (width) up to 4000 mm. [..] Read more

Abstract: Aluminum plating technology is used worldwide, not only in the automotive industry but also in household items. The essence of the technology is that a layer with a certain property is plated with another layer with different properties. [..] Read more

Abstract: The data presented here were obtained as part of the European FP7 MatISSE project to model the softening and relaxation behaviour of Grade 91 steel under creep-fatigue loading because this type of thermal loading is a major degradation mechanism in fast reactors. The supporting tests were focused on strain controlled low cycle fatigue tests with different strain amplitudes (εa = 0.45 %, 0.35 % and 0.25 %) and different tension hold times (1 and 12 hours) for temperature 600°C. [..] Read more

Abstract: Development and maintenance of materials for nuclear power plants and aerospace usage is an important area of the materials science. It includes the study of various aspects of materials damage as well as an improvement and development of new observation and testing techniques. [..] Read more

Abstract: Ledeburitic steels based on Cr- or Cr-V alloying belong to the most important cold-work tool materials for large series manufacturing. To enable high production stability, the tools must withstand various types of degradation processes. [..] Read more

Abstract: Testing of material fatigue properties belongs to important material examinations. A standard fatigue measurement is mostly a time-consuming and expensive experiment, among others due to a number of samples needed. [..] Read more

Abstract: Crack initiation of the ferritic martensitic steel T91 and austenitic steel 316L is currently under study. This is due to the evaluation ongoing in the EC for materials compatibility in Heavy Liquid Metals (HLM) environment, and, in particular, the issue of Liquid Metal Embrittlement.Slow Strain Rate Tensile (SSRT) tests were performed with flat specimens in PbBi at 300°C with oxygen content in the range of about 10-6 wt.% down to 10-12 wt.% and, for comparison in air, up to the point of maximal stress (without or with minimum necking). [..] Read more

Abstract: Growing efforts for weight and gas emission reduction in automotive industry led to development of advanced high strength steels (AHSS) with a very good strength-to-ductility balance. However, AHSS can be prone to hydrogen embrittlement, which leads to the degradation of mechanical properties, mainly ductility, in the presence of hydrogen. [..] Read more

Abstract: This paper documents the microstructure changes of steel SUPER 304H caused by high temperature overheating (1140 °C, 15 hours). The experimental material was firstly isothermally laboratory exposed about 30,000 hours at temperature 650 °C and then subject to high temperature overheating. [..] Read more

Abstract: Nitrriding is a one of the processes which is used to increase material surface hardness. Nitrogen supersaturated layer on the material surface significantly decreases its friction coefficient. [..] Read more

Abstract: The paper deals with influence of four temperatures of high temperature austenitization and two dwells on temperature on microstructure and substructure of heat-resistant 9CrNB steel. The microstructure consists of lathe martensite and bainite. [..] Read more

Abstract: Two cast and heat-treated NbC and TaC – strengthened cobalt superalloys have been developed for an investment casting of spinner discs for glass wool industry. In this work constant load creep tests in tension were carried out in argon atmosphere at three testing temperature 900, 950 and 1000 °C and at the initial applied stresses ranging from 40 to 200 MPa. [..] Read more

Abstract: This work deals with properties and microstructure of heat resistant chromium steel P92. This steel is considered to be one of the best modified 9-12 % Cr steel for the construction of coal power plants with ultra-super-critical steam parameters. [..] Read more

Abstract: This article is devoted to the influence of copper on the bainitic transformation. Copper addition hinders proeutectoid ferrite formation and thus is favourable for bainitization. [..] Read more

Abstract: Manufacturing of the tensile test specimens with minimal surface defects and close tolerances are the key factors to achieve desirable and accurate mechanical properties. In addition, faster and cost-effective manufacturing methods with reliable results are also critical requirements. [..] Read more

Abstract: Possibility of FeSiCr alloys production, with low content of carbon, in industrial conditions depends upon various factors like temperature of the solution, refining time, chemical compositions and others. In order to identify the evolution and behavior of solid inclusions in the solution, laboratory tests for alloys at high temperatures of 1400-1500 °C have been carried out. [..] Read more

Abstract: Many parts for automobiles and home electric appliances are made of steel sheets. In sheet metal forming processes, the knowledge of technological values, such as yield or tensile strength and r-value, enables a more precise control of processes and results in many benefits such as an improvement in yield efficiency in machining processes and a decrease in loss of material. [..] Read more

Abstract: Steel 34CrMo4 is commonly used for a variety of high strength application in many industrial areas. Some of such applications are exposed to environment containing H2S and high humidity that can cause the SSC issue. [..] Read more