An Aggregated Non-Destructive Testing (Ndt) Framework for the Assessment of Mechanical Properties of Unreinforced Masonry Italian Medieval Churches

2022 ◽  
Author(s):  
David Pirchio ◽  
Kevin Q. Walsh ◽  
Elizabeth Kerr ◽  
Ivan Giongo ◽  
Marta Giaretton ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Unreinforced Masonry ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive

Study of Nanostructured Composites Using the Sclerometry Method

2014 ◽  
Vol 627 ◽  
pp. 233-236 ◽  
Author(s):  
Natalia Lvova ◽  
Sergey Perfilov ◽  
A. Useinov
Keyword(s):  
Mechanical Properties ◽  
Quality Control ◽  
Comparative Study ◽  
Scratch Test ◽  
Extrusion Process ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Stress Strain ◽  
Nanostructured Composites ◽  
Non Destructive

A comparative study of the mechanical properties of the extruded and flattened nanostructured composites Al-C60 has been made using two different methods of destructive and non-destructive testing: tensile and compression macro-tests and sub-micron range sclerometry (scratch test). Direct correlation was found between the dominant types of deformation during scratching and the type of “stress-strain” dependencies. The results are useful for understanding the extrusion process and quality control at different load scale.

scholarly journals The Possibility of Extending the Life of Cast Steel Hulls of the Steam Turbine

2019 ◽  
Vol 49 (3) ◽  
pp. 17-32
Author(s):  
Adam Charchalis ◽  
Tomasz Dyl ◽  
Agata Wieczorska
Keyword(s):  
Mechanical Properties ◽  
Steam Turbine ◽  
Cast Steel ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Cold Zone ◽  
Last Stage ◽  
The Impact ◽  
Non Destructive ◽  
Material Tests

Abstract The paper presents the analyze the lifetime of the HP steam turbine hull for the EC Gdynia TG1 combined heat and power plant as part of the renovation. The impact of exploitation on changes in mechanical properties of the steam turbine hulls was determined. At the preliminary material tests were carried out, qualifying the hull of the steam turbine to undertake the revitalization process. Then, after non-destructive testing, trepanation samples were taken from the cold zone and the hot hull, which were subjected to mechanical properties tests. The next stage of work was the revitalization process including hardening and tempering. The mechanical properties and metallographic were carried out testing. In the next stage of work, non-destructive testing was performed to detect cracks and a decision was made to repair these areas by welding. The last stage of the work includes an analysis of the vitality of the steam turbine hull after revitalization.

scholarly journals Reinforcing the mechanical properties of poplar LVL with hardwood veneer layers, Part I.: Non-destructive testing and modelling the elastic properties

2014 ◽  
Vol 62 (1) ◽  
pp. 24-30
Author(s):  
Edit Beáta VILPPONEN ◽  
Szabolcs KOMÁN ◽  
László BEJÓ
Keyword(s):  
Mechanical Properties ◽  
Elastic Properties ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive

<p class="p1"><span class="s1">A hazai nemesnyár anyagok értéknövelt hasznosításának a</span>z egyik lehetősége az LVL termék<span class="s1"> készítése. A nyár LVL mechanikai tulajdonságai </span>némileg elmaradnak a jelenleg kapható fenyő LVL paramétereitől. A tulajdonságok javíthatók keménylombos erősítő rétegek alkalmazásával.</p><p class="p2">Az ismertetett kutatás során óriás- és olasznyár fafajtákból készült LVL mechanikai tulajdonságait módosítottuk bükk, csertölgy, illetve bálványf<span class="s2">a erősítő furnérrétegekke</span>l. Az elkészült LVL termékek mechanikai tulajdonságait roncsolásmentes módszerekkel és statikus vizsgálatokkal határoztuk meg. A lemezek rugalmassági modulusát modellezéssel is becsültük, a furnérrétegek elasztikus tulajdonságai és feltételezett tömörödése alapján.<span class="s2"> A cikksorozat első részében a roncsolásmentesen mért és modellezett elasztikus tulajdonságokat mutatjuk be.</span></p><p class="p3">Az erősítő rétegek használatával a rugalmassági modulus értékek szignifikánsan növekedtek. Bükk esetében a javulás a várakozásnak megfelelő volt, míg csertölgy, és különösen bálványfa esetén jóval meghaladták azt, ami mutatja, hogy e furnérok erősítő rétegként történő alkalmazásában jelentős lehetőségek rejlenek. Az alkalmazott modell jól becsülte a nyár kontroll lemezek és a bükk furnérral erősített lemezek rugalmassági modulusát, azonban konzervatív becslést adott a csertölgy és bálványfa rétegek hatása tekintetében.</p>

Автоматизированная система комплексного неразрушающего контроля структуры и механических свойств материалов машиностроения

2021 ◽  
Vol 3 ◽  
pp. 17-25
Author(s):  
Борис Велев ◽  
Иван Иванов ◽  
Владимир Каменов
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Acoustic Emission ◽  
Cast Iron ◽  
Structural Steel ◽  
Automated System ◽  
Magnetic Noise ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive

An automated system with two optimized modular devices is presented — MULTITEST-MC010 for research of ferromagnetic materials with the methods for measuring magnetic noise and magneto acoustic emission of Barkhausen and MULTITEST — CD010 for research of mechanical engineering materials with the methods of velocity measurement of longitudinal waves C and attenuation coefficient δof ultrasound. The main approaches and principles for the automated data processing of complex non-destructive testing are presented, as well as the setup of the modular devices of the automated system. For approbation of the system the influence of the heat treatment (hardness) in structural steel 40X on the non-destructive information parameters of the magnetic noise and the magneto acoustic emission — magnetic noise voltage EBN and voltage of the magneto acoustic emission EMAE was studied. The mechanical properties in foundry cast iron samples with complex measurement of the information parameters , C, by simultaneous use of the two modular devices of the system were also studied. The possibility for the complex application of these parameters for non-destructive testing of the mechanical properties after heat treatment in structural steel 40X and the tensile strength in cast iron specimens has been proven.

Evaluation of Mechanical Properties of Nuclear Materials Using Non-Destructive Ball Indentation Technique

2002 ◽  
Author(s):  
M. D. Mathew ◽  
K. Linga Murty
Keyword(s):  
Mechanical Properties ◽  
Mechanical Test ◽  
Cold Work ◽  
Nickel Base Superalloy ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Fracture Properties ◽  
Ball Indentation ◽  
Mechanical And Fracture Properties ◽  
Non Destructive

Integrity of structural components depends on the deformation and fracture behavior of materials. For evaluating the material condition in-service, it is generally not feasible or practical or advisable to cut samples from operating structures. Non-destructive testing (NDT) techniques are required to evaluate the mechanical properties. Although several NDT techniques such as ultrasound, magnetic strength, Barkhausen noise, microhardness etc., are employed for estimating the mechanical property degradation, these methodologies are generally empirical and indirect. Automated Ball Indentation (ABI) is a non-destructive testing technique for direct measurement of mechanical and fracture properties of metallic engineering materials. Because of the small area over which the test is carried out, it is possible to determine point to point variations in the mechanical and fracture properties, such as those that exist in weldments. Although ABI technique is non-intrusive, it is a state-of-the-art mechanical test that measures directly the current/local deformation behavior of the material. In this paper, we present results from studies on the application of ABI technique to determine tensile and fracture properties of ferritic steels, an austenitic stainless steel, a nickel base superalloy and Zircaloy in different thermo-mechanical conditions. The effects of aging and cold work on these properties were determined from the ABI tests. Gradients in mechanical properties of ferritic steel welds, particularly in the narrow heat-affected zone, were clearly established. ABI technique was found to be useful in determining the anisotropy in the tensile properties of Zircaloy cladding tubes. The technique has potential as a non-destructive method for assessing structural integrity of aged components.

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