Yield stress determination by the Massachusetts Institute of Technology miniaturized disk bend test

Journal Article · Sat Dec 01 00:00:00 EST 1990 · Nuclear Technology; (United States)

OSTI ID:5079182

Sohn, D S; Kohse, G E; Parks, D M ^[1]

---

1. Massachusetts Inst. of Tech., Cambridge, MA (United States). Nuclear Reactor Lab.

Considerable effort is currently being expended to develop mechanical property tests for various miniature specimens. Bend tests of thin 3-mm-dam disks (standard transmission electron microscopy specimens) have been used by various workers. In this paper a miniaturized disk bend test (MDBT) using a 3-mm-dam x 0.25-mm-thick disk is described and recent progress in extracting uniaxial yield stress values from bend test data is discussed. The method is based on the existence of an initial linear region in the load/deflection curve generated by the bend test. A strong relationship between the load at deviation from linearity and the uniaxial yield stress is found. By simulating observed load/deflection curves using a finite element stress/strain analysis, yield stresses can be calculated from MDBT data. Results using our approach to MDBT for a range of materials are presented, and good agreement with uniaxial tensile test data is shown.

• OSTI ID: 5079182
• Journal Information: Nuclear Technology; (United States), Vol. 92:3; ISSN 0029-5450
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
36 MATERIALS SCIENCE
ALLOYS
FLEXURAL STRENGTH
REACTOR COMPONENTS
IN-SERVICE INSPECTION
THERMONUCLEAR REACTORS
MATERIALS TESTING
CALCULATION METHODS
FINITE ELEMENT METHOD
PHYSICAL RADIATION EFFECTS
REACTOR SAFETY EXPERIMENTS
REACTOR SIMULATORS
STRESSES
ANALOG SYSTEMS
FUNCTIONAL MODELS
INSPECTION
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
RADIATION EFFECTS
SIMULATORS
TESTING
220400* - Nuclear Reactor Technology- Control Systems
220900 - Nuclear Reactor Technology- Reactor Safety
360103 - Metals & Alloys- Mechanical Properties
360106 - Metals & Alloys- Radiation Effects