Production of primary aluminium is energetically enormously expensive. The use secondary (recycled) aluminium, has therefore a high potential to save money and energy while reducing the negative environmental impact production. Although properties alloys are generally comparable those alloys, increased Fe content can lead significant reduction in corrosion resistance these alloys. Secondary AlSi7Mg0.3 cast alloy with different iron contents (0.123, 0.454, 0.679 1.209 wt. %) as-cast after...

Due to the combination of high corrosion resistance and suitable mechanical properties, AISI 316L stainless steel is extensively used as biomaterial for surgical implants. However, heat exposure in inappropriate temperatures can cause its sensitization accompanied by chromium depletion along grain boundaries. This study deals with an assessment susceptibility sensitized pitting under conditions simulating internal environment human body (Hank's balanced salt solution, 37 ± 0.5 °C). The...

The article deals with the analysis of structure and fracture surface aluminum alloy samples. Alu-minum AlMg9 was used as an experimental material. material from which samples were made supplied cast without heat treatment, specifically produced by continuous casting method. test examined using a Neophot 32 optical microscope, sample scanning electron microscope (SEM). fatigue life tested three-point bending cyclic loading parameters - frequency f = 100 Hz, temperature T 22 ± 5 ℃ stress...

As the modern automotive industry is looking for lightweight alternatives to minimize car emissions and fuel consumption, recycled Al-Si alloys play a key role in achieving this due their lightweight, high specific strength, good castability, corrosion resistance. In contrast many other benefits, these have reduced metallurgical micropurity as result of recycling. The most significant complication iron contamination. Higher Fe contents cause β-Fe-intermetallic phases form long brittle...

Abstract This paperwork is focused on the quality of AlSi6Cu4 casting with different wall thicknesses cast into metal mold. Investigated are structural changes (the morphology, size, and distribution components). The quantitative analysis used to numerically evaluate size area fraction parameters (α-phase, eutectic Si, intermetallic phases) between delivered experimental material thicknesses. Additionally, Brinell hardness performed obtain mechanical property benefits thin-walled alloys....

The use of secondary aluminium alloys gives manufacturers in many industries the opportunity to produce their products more economically and environmentally friendly. alloy production is sustainable long term. As does not lose its excellent properties through recycling, have potential replace primary applications. However, recycled disadvantage insufficient sorting thus a higher content impurities chemical composition. most common undesirable element Al-Si-Mg cast iron. It adversely affects...

Al has very good corrosion resistance and properties. The of cast alloys is different because these contain a lot elements. Especially in secondary which more impurity elements from Fe the most common. This study deals with AlSi7Mg0.3 are affected by chloride environment. environment was selected based on application castings automo-tive industry. main object to research effect such an basic me-chanical properties fatigue results show that higher content does not lead significant reduction...

Abstract Despite the tendency of current industry, especially automotive it is to use modern, light and super-strong materials based on Al or HSLA steels, application classic such as cast iron still makes sense, concerning price excellent castability. The article presents one possible ways using ultrasonic non-destructive method in quality control simplification identification type change parameters ultrasound propagation materials. main criteria for assessing determining graphite were...

This article investigates the effect of higher Fe content on formation brittle Fe-rich needle-like phases in heat-treated secondary AlSi7Mg0.6 cast alloy. These secondary-recycled alloys contain an increased amount impurities due to remelting scrap. The common unwanted impurity found these is Fe. Its negatively affects structure and mechanical properties. has low solubility Al-alloys thus forming intermetallic such as β-Al 5 FeSi. cannot be removed foundry conditions, so its reduced...

Al has very good corrosion resistance and properties. The of Al-cast alloys is different because these contain a lot elements, especially in secondary alloys, which more impurity Fe the most common. This study deals with AlSi7Mg0.3 cast are affected by chloride corrosive environment. environment was selected based on application castings automotive industry. main object to research effect such an basic mechanical properties fatigue results show that higher content does not lead significant...

High resistance to high and low temperatures, corrosion when exposed salt water alkaline media, wear, elongation, paramagnetism are all characteristics of austenitic nodular cast iron. However, less research has been done on the fatigue Therefore, objective this study is determine iron compare them those different types The used in (EN-GJSA-XNiCr20-2) was alloyed with 20% nickel 2% chromium create an matrix. Light metallographic microscopy examine microstructure. A tensile test, impact...

Ni-based superalloy 718 is especially suitable for high-temperature, high-pressure environments in aviation, where corrosion, creep, and thermal shock resistance are necessary safe operation. The listed properties of alloy obtained by heat treatment - precipitation hardening. Heat significantly affects the grain size basic gamma solid solution structural components such as L12 prime, DO22 double prime BCT delta phase. Their morphology, distribution degradation affect mechanical...

A significant number of different metals are present in aluminum alloy scrap and waste. Secondary cast alloys, made by recycling from waste, have as the main impurity Fe. Fe reduction is a very economically technologically expensive process therefore there growing interest researching such materials. Moreover, higher content leads to formation brittle Fe-rich phases, leading faster propagation fracture castings. Therefore, this study reflected on secondary with concentration research their...

The contribution describes the major problem with secondary (recycled) alloys as presence of unwanted elements due to remelting Alscrap negatively affecting quality AlSi7Mg0.6cast alloy.Iron is most harmful impurity in Al-Si alloys, leading formation β-Fe-rich (Al5FeSi) intermetallic phases that promotes forming casting defects such porosity and shrinkage by its needle-like shape.Suitable neutralizer alloying elements, Mn, influence Fe-needle-like lead less Mncontaining α-Fe-rich phases.To...

InvestIgatIon of self-HardenIng alZn10si8Mg Cast alloy for tHe autoMotIve Industry self-hardening aluminium alloys represent a new and interesting group alloys.They have the advantage that they do not need to be heat treated, which is an important contributes significant reduction in production costs some components amount energy used.The present paper deals with possibility replace most used treatable alsi7Mg0.3cast self-hardened cast alloy. this study, microstructural characterization...

The article is focused on the analysis of fracture mechanisms specimens made austenitic steel, which have been subjected to dynamic tests. Austenitic stainless steels are characterized as high corrosion resistant materials with bio-tolerance and relatively strength. They by cold working, where plastic deformation occurs they deformed especially slipping twinning. Deformed regions twins slip deformation. Specimens were used in two states, initial state after chemical-thermal treatment....

The two-phase titanium alloy Ti6Al4V (often referred to as GRADE 5 or Ti64) is currently probably the most widely used type of Ti alloy. It characterized by an excellent combination strength - toughness chemical stability. However, at temperatures above 500 800 °C it prone diffusion oxygen into surface layers, where increased content creates so-called “alpha-case” layer. formation this layer associated with a reduction mainly in deformation characteristics paper focuses on metallographic...

The article deals with the effect of applied fatigue load different cycle asymmetry parameters R, test temperature and loading frequency on crack initiation in IN718 superalloy. For this purpose, four sets experimental samples were produced. first second parameter R = -1 subjected to tests at f ≈ 20,000 kHz ambient temperature, respectively 64 Hz a 700°C. third fourth < 1 150 after applying annealing 800°C/72 hours. SEM fractography analysis was performed all define mechanism.

This paper investigates the fatigue behavior of secondary A357.0-T6 alloy with higher Fe content as a result usage recycled metals. Commercial Al-alloys contain Fe, often an undesirable impurity negatively affecting plasticity, tensile strength, and so on due to formation brittle intermetallic phases. A common unwanted phase is β-Al5FeSi in form platelets. plate-like morphology acts stress concentrator, leading decrease ductility, dynamic fracture toughness castings. Moreover, promoting...

The service life of components is related to surface abrasion, corrosion effects, as well the occurrence fatigue cracks. These effects begin spread from and therefore it very important properly influence mechanical properties materials increase life. In chemical-thermal treatment, resistance layer increased by saturating with suitably selected chemical elements. This affects change in structure properties. article will be focused on analysis fracture mechanisms samples made austenitic steel...