Penetrating buttock trauma: a life-threatening injury that highlights the importance of good collaboration with trauma receiving hospitals

A 54-year-old lady was brought to our A+E after falling from a stepladder onto the metallic base of her artificial Christmas tree. The metallic rod impaled her through the right buttock. X-rays and a CT was performed prior to transport to a trauma centre causing delays to her surgery.

Penetrating buttock trauma: a life-threatening injury that highlights the importance of good collaboration with trauma receiving hospitals

A 54-year-old lady was brought to our A+E after falling from a stepladder onto the metallic base of her artificial Christmas tree. The metallic rod impaled her through the right buttock. X-rays and a CT was performed prior to transport to a trauma centre causing delays to her surgery.

Characterization of the Corrosion Resistance of Composite Peened Aluminum

Composite peening offers the opportunity to introduce ceramic blasting particles into metallic base material. By embedding Al2O3 particles, mechanical properties of aluminum can be improved. However, those surface modifications might negatively impact corrosion resistance and thus shorten the lifetime of components. This study analyzes corrosion properties of peened aluminum in chloride solution via immersion, scanning electron microscopy and polarization. The data of observed microstructures indicate that peening accelerates corrosion and that intergranular corrosion is the main force of degradation in contrast with pitting corrosion of monolithic aluminum.

Analytical Methods in Standardization of Bhasmas: A Review

Ayurveda the ancient science well known for its potential therapeutic effects with unique metallic, herbal juices/fruits in the treatment of chronic ailments. A well- known ayurvedic potent preparation, Bhasma is also known as ash which is a metallic base prepared by sophisticated pharmaceutical processes also plays a major role in acute, sub-acute, and chronic diseases. In order to determine its quality and purity to make sure the acceptability, the safety of the formulation standardization is very necessary. In this short review, an attempt has been made to present ancient methods to standardize physical characterstics like Verna, Nisvadutam, Nishchandratvam, Varitara, Unama, Rekhapurmatvam, Slakshmatvam..etc.,and chemical characterstics of bhasmas like Apurnabhavta, Niruttha, Amla Pariksha with advanced methods like SEM, TEM, and NPST, along with other natural and ancient analytical techniques. Keywords: Bhasmas, Standardization, Analytical methods, SEM, TEM.

Assembly of MLT type permanent resistors

Considered technological processes of the assemblage of the constant resistors of MLT type for unattended installations, circular layout in two types: with the operation of welding the contact pins without welding (with pressure caps with leads); cutting helical grooves on the metallic base resistor on a special machine; varnishing and painting the raised resistors on the automated line. The equipment for straightening of axial contact terminals and laying of resistors from bulk in the pencil cassette is presented.

Recent Advances in Cast Iron Structure and Properties Ultrasonic Testing and Flaw Detection

The advantage of ultrasonic testing of iron castings prior to destructive control consists of an impressive reduction in time and costs, as well as the ability to assess the quality of the metal anywhere on the castings. According to the acoustic characteristics of cast iron it is possible to determine the form of graphite in it and its strength. The presence of chill in the metallic base and the thickness of the chilled layer is also determined by ultrasonic method. The use of electronic signal processing allows to distinguish it from high structural noise, which makes possible the testing of cast iron for a thickness of several meters. The use of transducers with phased array is the basis of the flaw detection of containers for nuclear waste from cast iron with globular graphite with a thickness of 500 mm.

INFLUENCE OF THE CAST IRON’S CHEMICAL COMPOSITION ON THE CONTENT OF CR IN THE BASE AFTER NORMALIZATION FROM 1050 C

The dependences of the influence of the chemical composition of cast iron in the Fe-Cr-Mn-Ni system on the chromium cotent in the metal base (Cr1050о) and carbides (Cr1050Cr) after normalization from 1050 °C with aging for 4.5 hours were established. During the heat treatment of the castings, a redistribution of the elements between the phases of the cast iron occurred. The maximum chromium concentration in the base after normalization was 19.7% at 1.09% C, 3.1% Mn, 25.5% Cr and 0.19% Ni, and the minimum 2.4% at 3.91% C, 0.6% Mn, 11.43% Cr and 0.19% Ni. The maximum amount of chromium in carbides 78.4% was observed in cast iron containing 1.09% C, 5.4% Mn, 3.01% Ni and 25.57% Cr, and the minimum 43.5% at 3.59% C, 5.4% Mn, 3.01% N and11.43% Cr. The obtained dependencies allow predicting the chromium content in the metallic base and can be used during the elaboration of new compositions for wear-resistant cast iron, as well as at choice of heat treatment regimes.

Structure and Properties of Cast Iron DESIGNATED for Working Layer of Rolls

<p class="1Body">The formation of the structure and properties of cast irons designated for the working layer during solidification and subsequent tempering of Indefinite Chill Double Poured Centrifugal Casting Rolls (ICDP) has been studied.</p><p class="1Body">Graphitization of cast irons designated for the working layer of rolls occurs under isothermal conditions at high temperatures, which vary over the cross section and resulted from casting the roll core. At subsequent slow cooling, secondary carbides precipitate and austenite partially transforms into martensite; the resulting end structure consists of martensite and austenite metallic base (primary austenite dendrites) with 11.4 per cent of retained austenite, 26 per cent of eutectic and secondary carbides, and 2.6 per cent of flake graphite.<em> </em></p><p class="1Body">The amount of retained austenite in the metallic base of the cast structure of cast iron designated for the working layer, heated to 430 °C, decreases<strong> </strong>from 11.4 per cent to 3.2 per cent due to the partial transformation into bainite. The martensite tetragonality decreases due to the carbide precipitation; the existing excess phases grow and the new ones are formed; the total volume fraction of the carbide phase increases to 29.8 per cent and graphite to 3.7 per cent.</p>