scholarly journals High-efficient low-cost characterization of materials properties using domain-knowledge-guided self-supervised learning

2022 ◽  
Author(s):  
Binglin Xie ◽  
Xianhua Yao ◽  
Weining Mao ◽  
Mohammad Rafiei ◽  
Nan Hu
Keyword(s):  
Supervised Learning ◽  
Domain Knowledge ◽  
Low Cost ◽  
Testing Procedure ◽  
High Efficient ◽  
Science Community ◽  
Properties Of Materials ◽  
Material Science Community ◽  
Characterization Of Materials

Abstract Modern AI-assisted approaches have helped material scientists revolutionize their abilities to better understand the properties of materials. However, current machine learning (ML) models would perform awful for materials with a lengthy production window and a complex testing procedure because only a limited amount of data can be produced to feed the model. Here, we introduce self-supervised learning (SSL) to address the issue of lacking labeled data in material characterization. We propose a generalized SSL-based framework with domain knowledge and demonstrate its robustness to predict the properties of a candidate material with the fewest data. Our numerical results show that the performance of the proposed SSL model can match the commonly-used supervised learning (SL) model with only 5 % of data, and the SSL model is also proven with ease of implementation. Our study paves the way to expand further the usability of ML tools for a broader material science community.

Mechanical characterization of materials for bulk forming using a drop weight testing machine

2010 ◽  
Vol 224 (9) ◽  
pp. 1795-1804 ◽  
Author(s):  
C M A Silva ◽  
P A R Rosa ◽  
P A F Martins
Keyword(s):  
Flow Stress ◽  
Mechanical Characterization ◽  
Low Cost ◽  
Testing Machine ◽  
Operating Conditions ◽  
Proportional Loading ◽  
Bulk Forming ◽  
Drop Weight ◽  
Characterization Of Materials

The main limitation of mechanical testing equipments is nowadays centred in the characterization of materials at medium loading rates. This is particularly important in bulk forming because strain rate can easily reach values within the aforesaid range. The aim of this article is twofold: (a) to present the development of a low-cost, flexible drop weight testing equipment that can easily and effectively replicate the kinematic behaviour of presses and hammers and (b) to provide a new level of understanding about the mechanical characterization of materials for bulk forming at medium rates of loading. Special emphasis is placed on the adequacy of test operating conditions to the functional characteristics of the presses and hammers where bulk forming takes place and to its influence on the flow stress. This is needed because non-proportional loading paths during bulk forming are found to have significant influence on material response in terms of flow stress. The quality of the flow curves that were experimentally determined is evaluated through its implementation in a finite-element computer program and assessment is performed by means of axisymmetric upset compression with friction. Results show that mechanical characterization of materials under test operating conditions that are similar to real bulk forming conditions is capable of meeting the increasing demand of accurate and reliable flow stress data for the benefit of those who apply numerical modelling of process design in daily practice.

Construction of a Low Cost Photoacoustic Spectrometer for Characterization of Materials

2005 ◽  
Vol 222 (1) ◽  
pp. 287-296 ◽  
Author(s):  
M.A. Jothi Rajan ◽  
Arockiam Thaddeus ◽  
T. Mathavan ◽  
T.S. Vivekanandam ◽  
S. Umapathy
Keyword(s):  
Low Cost ◽  
Photoacoustic Spectrometer ◽  
Characterization Of Materials

scholarly journals Synthesis and Characterization of Co0.8-x Nix Zn0.2 Fe2O4 Ferrites by Williamson–Hall and Size–Strain Plot Methods

2019 ◽  
Vol 27 (1) ◽  
pp. 73-86
Author(s):  
Ravikumar Kolekar ◽  
Suresh Baburao Kapatkar ◽  
Shridhar Narasinhmurthy Mathad
Keyword(s):  
Particle Size ◽  
Low Cost ◽  
Solid State Reaction Method ◽  
X Ray Diffraction ◽  
Ionic Radii ◽  
Texture Coefficients ◽  
Hall Plot ◽  
Zn Ferrite ◽  
Properties Of Materials

Abstract The Co-Zn ferrite (x=0.00) and Nickel doped Co-Zn ferrites (x=0.24) was synthesized by low cost solid state reaction method and characterized by XRD technique. The X-ray diffraction results for the samples showed the formation of single phase cubic spinel. The lattice constant and particle size for Co-Zn ferrite(x=0.00) is found to be 8.3465 Å and 26.72 nm and for Nickel doped (x=0.24) it is 8.3440 Å and 24.21nm. Micro strain (ε), Dislocation density(ρD), Hopping lengths (LA and LB), Bond lengths (A - O and B-O), Ionic radii (rA and rB), Texture coefficients (Thkl) and Standard deviation (σ) are also reported. The particle size is confirmed by scanning electron microscope (SEM). The Williamson-Hall plot and stress-strain plot also employed to understand the mechanical properties of materials.

scholarly journals Call for papers on special issue “Current trends in biopolymer-based materials”

2020 ◽  
Vol 2 (1) ◽  
pp. 046-046
Keyword(s):  
Materials Science ◽  
Low Cost ◽  
Edible Films ◽  
Synthetic Polymers ◽  
Special Issue ◽  
Materials Engineering ◽  
Current Trends ◽  
Characterization Of Materials ◽  
Processing Techniques

Aim & Scope: The importance of materials has been, is and will be very important for life. Recently, the technology of materials is being focused on polymers and composite materials, since with them it is possible to obtain a material with optimal properties for the required application. Specifically, the convergence of materials science with materials engineering leads to the combination of the production and characterization of materials for different specific applications. Nowadays, polymer-based materials have been proposed for different applications like foods (formation and stabilization of foods, supply dietary fibers or micro- and nanoencapsulation), packaging (structural and mechanical properties or edible films), cosmetic and pharmaceutical industry (low cost, sustainability and naturalness, even in regenerative medicine as biomaterials. Aiming to explore these concepts, this Special Issue will focus on the current trends for polymer-based materials and their possible applications, as well as the study of traditional and emerging processing techniques. In addition, different characterization techniques will be evaluated and described. Submissions can cover the following topics (but are not limited to them):– Natural-based polymers; – Polysaccharides and proteins in materials science; – Synthetic polymers in materials science; – Processing of biopolymers; – Nanomaterials. We kindly invite you to submit a manuscript(s) for this Special Issue. Full papers, communications, and reviews are all welcome.

Multi-Physics of Nanoscale Thin Films and Interfaces

2011 ◽  
Author(s):  
M. A. Haque
Keyword(s):  
Thin Films ◽  
Tensile Fracture ◽  
Simultaneous Acquisition ◽  
Transmission Electron ◽  
Properties Of Materials ◽  
Mechanical Tensile ◽  
Characterization Of Materials ◽  
Materials Behavior

We present the design and fabrication of a microchip capable of performing mechanical (tensile, fracture, fatigue), electrical (conductivity and band gap) and thermal (conductivity and specific heat) characterization of materials and interfaces. The chip can study thin films and wires of any material that can be deposited on a substrate or study thin coupons if the specimen is in bulk form. The 3 mm × 3 mm size of the chip results in the unique capability of in-situ testing in analytical chambers such as the transmission electron microscope. The basic concept is to ’see’ the micro-mechanisms while ‘measuring’ the deformation and transport properties of materials and interfaces. The advantage of such simultaneous acquisition of quantitative and qualitative data is the accurate and quick physics-based modeling of materials behavior. We present preliminary studies on multi-physics, or the coupling among mechanical thermal and electrical domains in materials will be presented. These results are particularly important when the specimen dimension becomes comparable to the mean free paths of electron and phonons.

Some applications of electron beam microanalysis techniques in VLSI process evaluation

1983 ◽  
Vol 41 ◽  
pp. 160-161
Author(s):  
Simon Thomas
Keyword(s):  
Integrated Circuits ◽  
Process Evaluation ◽  
Large Scale ◽  
Technology Development ◽  
Analytical Techniques ◽  
Successful Implementation ◽  
Analysis Of Failures ◽  
Characterization Of Materials ◽  
Circuits Vlsi

Trends in the technology development of very large scale integrated circuits (VLSI) have been in the direction of higher density of components with smaller dimensions. The scaling down of device dimensions has been not only laterally but also in depth. Such efforts in miniaturization bring with them new developments in materials and processing. Successful implementation of these efforts is, to a large extent, dependent on the proper understanding of the material properties, process technologies and reliability issues, through adequate analytical studies. The analytical instrumentation technology has, fortunately, kept pace with the basic requirements of devices with lateral dimensions in the micron/ submicron range and depths of the order of nonometers. Often, newer analytical techniques have emerged or the more conventional techniques have been adapted to meet the more stringent requirements. As such, a variety of analytical techniques are available today to aid an analyst in the efforts of VLSI process evaluation. Generally such analytical efforts are divided into the characterization of materials, evaluation of processing steps and the analysis of failures.

Applications of ultramicrotomy for materials characterization

1993 ◽  
Vol 51 ◽  
pp. 232-233
Author(s):  
R.T. Blackham ◽  
J.J. Haugh ◽  
C.W. Hughes ◽  
M.G. Burke
Keyword(s):  
Materials Science ◽  
Microstructural Analysis ◽  
Analytical Electron Microscopy ◽  
Austenitic Stainless Steels ◽  
Specimen Preparation ◽  
Preparation Technique ◽  
Thermally Induced ◽  
Radiation Induced ◽  
Characterization Of Materials

Essential to the characterization of materials using analytical electron microscopy (AEM) techniques is the specimen itself. Without suitable samples, detailed microstructural analysis is not possible. Ultramicrotomy, or diamond knife sectioning, is a well-known mechanical specimen preparation technique which has been gaining attention in the materials science area. Malis and co-workers and Glanvill have demonstrated the usefulness and applicability of this technique to the study of a wide variety of materials including Al alloys, composites, and semiconductors. Ultramicrotomed specimens have uniform thickness with relatively large electron-transparent areas which are suitable for AEM anaysis.Interface Analysis in Type 316 Austenitic Stainless Steel: STEM-EDS microanalysis of grain boundaries in austenitic stainless steels provides important information concerning the development of Cr-depleted zones which accompany M23C6 precipitation, and documentation of radiation induced segregation (RIS). Conventional methods of TEM sample preparation are suitable for the evaluation of thermally induced segregation, but neutron irradiated samples present a variety of problems in both the preparation and in the AEM analysis, in addition to the handling hazard.

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