scholarly journals Development of ASTM Standards in Support of Advanced Ceramics — Continuing Efforts

1998 ◽  
Author(s):  
Charles R. Brinkman
Keyword(s):  
International Standards ◽  
Material Behavior ◽  
Composite Ceramics ◽  
Advanced Ceramics ◽  
Component Reliability ◽  
Nondestructive Examination ◽  
Analysis And Design ◽  
Optimum Material ◽  
American Society ◽  
Statistical Analysis And Design

An update is presented of the activities of the American Society for Testing and Materials (ASTM) Committee C-28 on Advanced Ceramics. Since its inception in 1986, this committee, which has five standard producing subcommittees, has written and published over 32 consensus standards. These standards are concerned with mechanical testing of monolithic and composite ceramics, nondestructive examination, statistical analysis and design, powder characterization, quantitative microscopy, fractography, and terminology. These standards ensure optimum material behavior with physical and mechanical property reproducibility, component reliability, and well-defined methods of data treatment and material analysis for both monolithic and composite materials. Committee C-28 continues to sponsor technical symposia and to cooperate in the development of international standards. An update of recent and current activities as well as possible new areas of standardization work will be presented.

ASTM Standards for Monolithic and Composite Advanced Ceramics: Industrial, Governmental and Academic Cooperation

1996 ◽  
Author(s):  
Michael G. Jenkins ◽  
George D. Quinn
Keyword(s):  
International Standards ◽  
Material Behavior ◽  
Market Place ◽  
Advanced Ceramics ◽  
Component Reliability ◽  
Material Development ◽  
Heat Engines ◽  
Optimum Material ◽  
American Society ◽  
Primary Standards

Monolithic and composite advanced ceramics have reached sufficient levels of material development to warrant serious consideration for applications in advanced heat engines. These applications require optimum material behavior with physical and mechanical property reproducibility, component reliability, and well-defined methods of data treatment and materials analysis. As new materials are introduced into the market place, these issues are best dealt with via standard methods. The primary standards writing organization in the U.S. is the American Society for Testing and Materials (ASTM), a private, nonprofit corporation which relies upon the voluntary cooperation of industry, government, and academe to develop standards by consensus. ASTM Committee C28 “Advanced Ceramics” has been active since 1986 and currently has 16 standards “on the books” with 17 standards in the balloting process. Overviews of the five subcommittees of C28 are presented. Accomplishments to date are discussed, as well as future activities, including a brief summary of joint cooperative efforts with international standards formulating organizations.

Revising and Validating Spectral Irradiance Reference Standards for Photovoltaic Performance Evaluation

Solar Energy ◽  
2002 ◽  
Author(s):  
Daryl R. Myers ◽  
Keith Emery ◽  
C. Gueymard
Keyword(s):  
Photovoltaic Performance ◽  
International Standards ◽  
Spectral Irradiance ◽  
International Electrotechnical Commission ◽  
Spectral Radiation ◽  
Atmospheric Physics ◽  
Additional Information ◽  
American Society ◽  
Consensus Standard ◽  
International Standards Organization

In 1982, the American Society for Testing and Materials (ASTM) adopted consensus standard direct-normal and global-tilted solar terrestrial spectra (ASTM E891/E892). These standard spectra were intended to evaluate photovoltaic (PV) device performance and other solar-related applications. The International Standards Organization (ISO) and International Electrotechnical Commission (IEC) adopted these spectra as spectral standards ISO 9845-1 and IEC 60904-3. Additional information and more accurately representative spectra are needed by today’s PV community. Modern terrestrial spectral radiation models, knowledge of atmospheric physics, and measured radiometric quantities are applied to develop new reference spectra for consideration by ASTM.

What’s New in Section XI, Rules for Inservice Inspection of Nuclear Power Plant Components

2004 ◽  
Author(s):  
Gary Park
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Mechanical Engineering ◽  
Nuclear Industry ◽  
Nondestructive Examination ◽  
American Society ◽  
Plant Components

The nuclear industry is a pretty dynamic industry, in that it is always on the move, changing every time we turn around. For that very reason, there is a need to keep up with the industry by providing changes to American Society of Mechanical Engineering Section XI, “Rules for Inservice Inspection of Nuclear Power Plant Components.” There have been many changes over the last three years. This paper addresses a few of those, but gives a feel for the number of changes from the 2000 Addenda to the 2003 Addenda, there have been a total of approximately 56 changes. Of those changes, 11 were in the repair/replacement requirements, 19 in the inspection requirements, 4 in the evaluation requirements, 18 in the nondestructive examination requirements, and 4 in the administrative requirements. The paper classifies the changes as “Technically Significant,” “Significant,” “Non-Significant,” or “Editorial.” The paper addresses only a few of those changes that were “Technically Significant.” The paper also includes some of the activities that the ASME Section XI Subcommittee is currently working on.

An Approach to Development of Manufacturing Data Report According to International Standards

2018 ◽  
Vol 879 ◽  
pp. 248-253
Author(s):  
Papatsorn Singhatham ◽  
Chokchai Singhatham ◽  
Niphaporn Panya ◽  
Salakchit Pukjaroon
Keyword(s):  
Quality Control ◽  
Quality Assurance ◽  
Petrochemical Industry ◽  
Industrial Sector ◽  
International Standards ◽  
Maintenance Management ◽  
Clear Pattern ◽  
Standard Format ◽  
Equipment Operation ◽  
American Society

The research purposes to design, analyze and build a report (MDR) integrity. To use as the MDR prototype in accordance with international standards for industrial factories. The MDR is important to the operator of equipment, the factories, and petrochemical industry because of it is an index for the quality assurance, quality control of fabrication and planning of maintenance management (material upgrade/ equipment change) for safety during equipment operation. When the equipment has a problem we can check for cause from the fabrication history data on MDR. A survey was developed for people concerned with the MDR, totaling 141 people from 58 factories in Thailand industrial sector for find out the demands and problems on using the MDR. The result shows that preparation of the MDR can cost more than a week of time, with no clear pattern of standard format and require manpower more than 3 peoples. In summary, the development of the MDR prototype by comparative data between, the manufacturer, the Ministry of Industry of Thailand and the American Society of Mechanical Engineers (ASME). The specialists who have the experience in the MDR to determine the completeness and validate all content in the MDR 15 chapters.

scholarly journals Modeling of the Size Effects on the Behavior of Metals in Microscale Deformation Processes

2006 ◽  
Vol 129 (3) ◽  
pp. 470-476 ◽  
Author(s):  
Gap-Yong Kim ◽  
Jun Ni ◽  
Muammer Koç
Keyword(s):  
Grain Size ◽  
Size Effect ◽  
Size Effects ◽  
Specimen Size ◽  
Material Behavior ◽  
Accurate Analysis ◽  
Analysis And Design ◽  
Scaling Model ◽  
Simple Tension ◽  
Two Parameters

For the accurate analysis and design of microforming process, proper modeling of material behavior at the micro/mesoscale is necessary by considering the size effects. Two size effects are known to exist in metallic materials. One is the “grain size” effect, and the other is the “feature/specimen size” effect. This study investigated the feature/specimen size effect and introduced a scaling model which combined both feature/specimen and grain size effects. Predicted size effects were compared with three separate experiments obtained from previous research: a simple compression with a round specimen, a simple tension with a round specimen, and a simple tension in sheet metal. The predicted results had a very good agreement with the experiments. Quantification of the miniaturization effect has been achieved by introducing two parameters, α and β, which can be determined by the scaling parameter n, to the Hall–Petch equation. The scaling model offers a simple way to model the size effect down to length scales of a couple of grains and to extend the use of continuum plasticity theories to micro/mesolength scales.

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