Stress relief by annealing under external stress in Fe-based metallic glasses

2018 ◽  
Vol 124 (16) ◽  
pp. 165108 ◽  
Author(s):  
M. C. Ri ◽  
D. W. Ding ◽  
S. Sohrabi ◽  
B. A. Sun ◽  
W. H. Wang
Keyword(s):  
Metallic Glasses ◽  
Stress Relief ◽  
External Stress

scholarly journals Fracture patterns in thin films and multilayers

2003 ◽  
Vol 795 ◽  
Author(s):  
Alex A. Volinsky ◽  
Dirk C. Meyer ◽  
Tilmann Leisegang ◽  
Peter Paufler
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Residual Stress ◽  
Stress Relief ◽  
Fracture Pattern ◽  
External Stress ◽  
Final Fracture ◽  
Fracture Patterns ◽  
Buckling Delamination ◽  
Applied Stresses

ABSTRACTWhile there are many stress relief mechanisms observed in thin films, excessive residual and externally applied stresses cause film fracture. In the case of tensile stress a network of through-thickness cracks forms in the film. In the case of compressive stress thin film buckling is observed in the form of blisters. Thin film delamination is an inseparable phenomenon of buckling. The buckling delamination blisters can be either circular, straight, or form periodic buckling patterns commonly known as telephone cord delamination morphology.While excessive biaxial residual stress is the key for causing thin film fracture, either in tension, or compression, it is the influence of the external stress that can control the final fracture pattern. In this paper we consider phone cord buckling delamination observed in compressed W/Si and TiWN/GaAs thin film systems, as well as spiral and sinusoidal though-thickness cracks observed in Mo/Si multilayers under 3-point high-temperature bending in tension.

Field Application of Externally Stress-Relieved Drill Collars

1977 ◽  
Vol 99 (1) ◽  
pp. 149-151
Author(s):  
L. A. Primm
Keyword(s):  
Fatigue Life ◽  
Stress Relief ◽  
Field Application ◽  
External Stress

This paper discusses the 1975 field results of the application of external stress relief grooves on drill collars. It contains a formula for the calculation of the groove diameter and makes recommendations for how and where to cut these features. Increased connector fatigue life was gained.

TEM investigations of surface residual stress relaxation in A12O3 and Al2O3-SiC nanocomposite

1994 ◽  
Vol 52 ◽  
pp. 628-629
Author(s):  
J. Fang ◽  
H. M. Chan ◽  
M. P. Harmer
Keyword(s):  
Residual Stress ◽  
Single Phase ◽  
Stress Relief ◽  
Stress Recovery ◽  
Surface Residual Stress ◽  
Microscopic Mechanism ◽  
Sic Particles ◽  
Annealing Procedure ◽  
The Difference ◽  
Nano Size

It was Niihara et al. who first discovered that the fracture strength of Al2O3 can be increased by incorporating as little as 5 vol.% of nano-size SiC particles (>1000 MPa), and that the strength would be improved further by a simple annealing procedure (>1500 MPa). This discovery has stimulated intense interest on Al2O3/SiC nanocomposites. Recent indentation studies by Fang et al. have shown that residual stress relief was more difficult in the nanocomposite than in pure Al2O3. In the present work, TEM was employed to investigate the microscopic mechanism(s) for the difference in the residual stress recovery in these two materials.Bulk samples of hot-pressed single phase Al2O3, and Al2O3 containing 5 vol.% 0.15 μm SiC particles were simultaneously polished with 15 μm diamond compound. Each sample was cut into two pieces, one of which was subsequently annealed at 1300° for 2 hours in flowing argon. Disks of 3 mm in diameter were cut from bulk samples.

Crystallization and magnetic properties of CoNbBCu metallic glasses

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-27-Pr2-30
Author(s):  
L. Malkinski ◽  
A. Slawska-Waniewska ◽  
R. Zuberek ◽  
A. Wisniewski ◽  
H. K. Lachowicz ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Metallic Glasses

WHY DO METALLIC GLASSES FORM ?

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-139-C8-140
Author(s):  
J. Hafner
Keyword(s):  
Metallic Glasses
Sign in / Sign up

Export Citation Format

Share Document