Notch constraint effects on the dynamic fracture toughness of an unaged beta titanium alloy
The influence of notch included angle and root radius on the apparent dynamic fracture toughness of an unaged metastable beta titanium alloy, Ti--3Al-- 8V--6Cr--4Zr--4Mo, has been examined. The apparent fracture toughness, K/sub Id/ (rho), increases with both notch radius, rho and included angle, $omega$. These results have been compared with the theoretical predictions of Tetelman, et al. and Smith. The comparisons show that neither theory accurately describes the effect of varying notch constraint on the apparent dynamic fracture toughness. Although preliminary considerations indicate that qualitative descriptions of notch acuity effects may be given by recent finite element analysis of the stress and strain distributions below a notch root, there is presently no quantitative basis for determining the true dynamic fracture toughness of materials from the results of blunt notch experiments. (auth)
- Research Organization:
- Sandia Labs., Albuquerque, N.Mex. (USA)
- NSA Number:
- NSA-33-003497
- OSTI ID:
- 4200930
- Report Number(s):
- SAND--75-5696
- Country of Publication:
- United States
- Language:
- English
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*CHROMIUM ALLOYS-- FRACTURE PROPERTIES
*MOLYBDENUM ALLOYS-- FRACTURE PROPERTIES
*TITANIUM BASE ALLOYS-- FRACTURE PROPERTIES
*VANADIUM ALLOYS-- FRACTURE PROPERTIES
*ZIRCONIUM ALLOYS-- FRACTURE PROPERTIES
360103* --Materials--Metals & Alloys--Mechanical Properties
CRACKS
DUCTILITY
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
NOTCHES