THE EFFECT OF DEFORMATION ON THE INTERNAL FRICTION OF IRON MEASURED AT THE CARBON PEAK POSITION

1959 ◽  
Vol 37 (12) ◽  
pp. 1474-1481 ◽  
Author(s):  
F. W. C. Boswell
Keyword(s):  
Solid Solution ◽  
Internal Friction ◽  
Strain Aging ◽  
Iron Carbide ◽  
Peak Position ◽  
Carbon Segregation ◽  
Aging Theory ◽  
Dislocation Densities ◽  
Carbide Particles ◽  
Carbon Peak

Experiments have been carried out to investigate the influence of deformation on the internal friction of iron measured at the carbon peak. As a result of deformation the internal friction increased and then decreased with time. These changes, corrected for a background change associated with the deformation, were shown to follow a time law predicted for carbon segregation to dislocations. It is concluded that the amount of carbon in random solid solution is increased by the deformation. By analyzing the rate of decrease of internal friction following deformation in terms of strain-aging theory the final dislocation densities were determined. The results also indicate that in some cases the carbon put into solution by the deformation was initially present in the form of iron carbide particles.

INTERNAL FRICTION STUDIES ON HYDROGEN IN SOLID SOLUTION IN V-Nb ALLOYS

1985 ◽  
Vol 46 (C10) ◽  
pp. C10-107-C10-110
Author(s):  
C. V. OWEN ◽  
O. BUCK ◽  
R. R. SMITH ◽  
D. T. PETERSON
Keyword(s):  
Solid Solution ◽  
Internal Friction

Stress of Homogeneous and Graded Epitaxial Thin Films Studied by Full-Shape Analysis of High Resolution Reciprocal Space Maps

2013 ◽  
Vol 768-769 ◽  
pp. 249-256
Author(s):  
Tatjana Ulyanenkova ◽  
Andrei Benediktovitch ◽  
Maksym Myronov ◽  
John Halpin ◽  
Stephen Rhead ◽  
...  
Keyword(s):  
Solid Solution ◽  
Residual Stress ◽  
High Resolution ◽  
Bragg Peak ◽  
Solution Concentration ◽  
Peak Position ◽  
Reciprocal Space ◽  
Epitaxial Thin Films ◽  
Peak Shape

The Bragg peak position of a homogeneous solid solution epitaxial film is directly related to the solid solution concentration, film strain and, consequently, residual stress. The peak shape contains information about defects present in the sample. In the case of compositionally graded epitaxial films the situation is more complex since instead of a single Bragg peak there is a continuous diffracted intensity distribution which can be measured by means of recording high resolution reciprocal space maps. We analyse the thin film residual stress based not only on peak positions, but taking into account the defect-induced peak shape as well. Consideration of the peak shape enables the determination of the stress depth profile in the case of graded films and to imporves the accuracy in the case of homogeneous films.

Internal friction study on the existence of oxygen pairs in interstitial solid solution of tantalum with oxygen

1981 ◽  
Vol 29 (6) ◽  
pp. 1055-1060 ◽  
Author(s):  
M. Weller ◽  
J.X. Zhang ◽  
G.Y. Li ◽  
T.S. Kê ◽  
J. Diehl
Keyword(s):  
Solid Solution ◽  
Internal Friction ◽  
Interstitial Solid Solution ◽  
Friction Study

Internal Friction of Cast Graphite-Magnesium Composites

1988 ◽  
Vol 120 ◽  
Author(s):  
J. H. Armstrong ◽  
S. P. Rawal ◽  
M. S. Misra
Keyword(s):  
Internal Friction ◽  
Strain Amplitude ◽  
Friction Model ◽  
Piezoelectric Composite ◽  
Amplitude Dependence ◽  
Friction Behavior ◽  
Dislocation Densities ◽  
The Matrix ◽  
Composite Strain ◽  
Zr Alloy

AbstractInternal friction behavior in cast 8-ply [0°1 P55Gr/Mg-0.6%Zr alloy and P55Gr/Mg-1%Mn composites as a function of vibratory strain amplitude was measured at 80 kHz using a Marxtype piezoelectric composite oscillator. Both the matrix and composite exhibited strain amplitude independent internal friction below ε ≈ 10−6, while significant strain amplitude dependence was noted at higher strain levels. A maxima in damping was observed for most of the specimens tested. Heat treatment to enlarge grain size was found to increase both the strain amplitude independent and dependent internal friction of the composite. Strain amplitude dependence of the internal friction, including the existence of the maxima, was explained by the Granato-Lucke (G-L) dislocation internal friction model. Dislocation densities obtained from various TEM images from the fiber-matrix interface were compared to values predicted by G-L theory.

scholarly journals Internal Friction and Microstructure of Ti and Ti-Mo Alloys Containing Oxygen

2016 ◽  
Vol 61 (1) ◽  
pp. 25-30 ◽  
Author(s):  
J.R.S. Martins ◽  
R.O. Araújo ◽  
R.A. Nogueira ◽  
C.R. Grandini
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Wear Resistance ◽  
Internal Friction ◽  
Good Combination ◽  
Relaxation Processes ◽  
Mechanical Spectroscopy ◽  
Excellent Corrosion Resistance ◽  
Low Elastic Modulus ◽  
Internal Friction Spectra

Ti-Mo alloys are promising materials for use as biomaterials, because these alloys have excellent corrosion resistance and a good combination of mechanical properties such as fatigue, low elastic modulus, hardness, and wear resistance. The objective of this paper was to study the effect of heavy interstitial atoms on anelastic properties of Ti-Mo alloys using mechanical spectroscopy. The internal friction and Young’s modulus were measured as a function of temperature using dynamic mechanical analyser. The internal friction spectra were brought about by relaxation processes attributed to shortrange stress induced reorientation of interstitial and substitutional complexes in solid solution. It is suggested that the nature of the relaxing entities can be worked out in further research on Ti-Mo single crystals.

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