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Title: Optimization of test parameters for quantitative stress measurements using the miniaturized disk-bend test

Abstract

A recently-developed miniaturized disk-bend test (MDBT) has been successfully used to evaluate the mechanical properties of a variety of materials, using specimens 3 mm in diameter. The load is applied either by a solid ball (the ball-on ring (BOR) mode), or by a hollow cylinder (the ring-on-ring (ROR) mode). They authors have reproduced the yield stresses of ordered intermetallic compounds and the fracture toughness of several ceramics using analytical solutions to the equations of elasticity theory. Despite this success there are several curious features involved in the analysis of data; for example, in previous tests conducted in the BOR mode correct values of the yield stress were obtained using the equations appropriate to clamped specimens, whether or not hey were actually clamped in the test fixture. They show that this is ubiquitous to tests in the BOR mode, and does not arise because of frictional constraints at the supporting ring. They have also completed a thorough evaluation of testing in the ROR mode, in which the yield stresses of cold-rolled or annealed AISI type 302 stainless steel were measured using various combinations of specimen thickness and radii of the loading and supporting rings, and compared to those of tensile specimensmore » machined from the same material. The most accurate and reproducible measurements of the yield strength were obtained for specific combinations of specimen thickness and geometry of the apparatus.« less

Authors:
 [1]; ; ;  [2]
  1. (YTC America, Inc., Camarillo, CA (United States))
  2. (Univ. of California, Los Angeles, CA (United States). Dept. of Materials Science and Engineering)
Publication Date:
OSTI Identifier:
6208224
DOE Contract Number:  
FG03-86ER45264
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Testing and Evaluation; (United States); Journal Volume: 21:4
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; FRACTURE PROPERTIES; STAINLESS STEEL-302; YIELD STRENGTH; ANALYTICAL SOLUTION; COMPARATIVE EVALUATIONS; DATA ANALYSIS; INTERMETALLIC COMPOUNDS; MATERIALS TESTING; MECHANICAL PROPERTIES; OPTIMIZATION; STRESS ANALYSIS; THICKNESS; ALLOYS; AUSTENITIC STEELS; CHROMIUM ALLOYS; CHROMIUM-NICKEL STEELS; CORROSION RESISTANT ALLOYS; DIMENSIONS; EVALUATION; HEAT RESISTANT MATERIALS; HEAT RESISTING ALLOYS; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; NICKEL ALLOYS; STAINLESS STEELS; STEEL-CR18NI9; STEELS; TESTING; 360103* - Metals & Alloys- Mechanical Properties; 360203 - Ceramics, Cermets, & Refractories- Mechanical Properties

Citation Formats

Meyers, D.E., Chen, F.C., Zhang, J., and Ardell, A.J.. Optimization of test parameters for quantitative stress measurements using the miniaturized disk-bend test. United States: N. p., 1993. Web.
Meyers, D.E., Chen, F.C., Zhang, J., & Ardell, A.J.. Optimization of test parameters for quantitative stress measurements using the miniaturized disk-bend test. United States.
Meyers, D.E., Chen, F.C., Zhang, J., and Ardell, A.J.. Thu . "Optimization of test parameters for quantitative stress measurements using the miniaturized disk-bend test". United States.
@article{osti_6208224,
title = {Optimization of test parameters for quantitative stress measurements using the miniaturized disk-bend test},
author = {Meyers, D.E. and Chen, F.C. and Zhang, J. and Ardell, A.J.},
abstractNote = {A recently-developed miniaturized disk-bend test (MDBT) has been successfully used to evaluate the mechanical properties of a variety of materials, using specimens 3 mm in diameter. The load is applied either by a solid ball (the ball-on ring (BOR) mode), or by a hollow cylinder (the ring-on-ring (ROR) mode). They authors have reproduced the yield stresses of ordered intermetallic compounds and the fracture toughness of several ceramics using analytical solutions to the equations of elasticity theory. Despite this success there are several curious features involved in the analysis of data; for example, in previous tests conducted in the BOR mode correct values of the yield stress were obtained using the equations appropriate to clamped specimens, whether or not hey were actually clamped in the test fixture. They show that this is ubiquitous to tests in the BOR mode, and does not arise because of frictional constraints at the supporting ring. They have also completed a thorough evaluation of testing in the ROR mode, in which the yield stresses of cold-rolled or annealed AISI type 302 stainless steel were measured using various combinations of specimen thickness and radii of the loading and supporting rings, and compared to those of tensile specimens machined from the same material. The most accurate and reproducible measurements of the yield strength were obtained for specific combinations of specimen thickness and geometry of the apparatus.},
doi = {},
journal = {Journal of Testing and Evaluation; (United States)},
number = ,
volume = 21:4,
place = {United States},
year = {Thu Jul 01 00:00:00 EDT 1993},
month = {Thu Jul 01 00:00:00 EDT 1993}
}