LOW-FREQUENCY INTERNAL FRICTION OF As-CAST MANGANESE-COPPER ALLOYS

1985 ◽  
Vol 46 (C10) ◽  
pp. C10-413-C10-416
Author(s):  
WEN YITING ◽  
XIE CUNYI ◽  
CHEN HUI
Keyword(s):  
Internal Friction ◽  
Copper Alloys ◽  
Low Frequency ◽  
Manganese Copper

Non-linear internal friction and resonance in manganese-copper alloys

1994 ◽  
Vol 29 (14) ◽  
pp. 3813-3816
Author(s):  
Xie Cunyi ◽  
Zhang Lide ◽  
Wang Litian
Keyword(s):  
Internal Friction ◽  
Copper Alloys ◽  
Non Linear ◽  
Manganese Copper

Effect of Heat Treatments on the Damping Characteristics of TiNi-Based Shape Memory Alloys

2006 ◽  
Vol 319 ◽  
pp. 33-38 ◽  
Author(s):  
I. Yoshida ◽  
Kazuhiro Otsuka
Keyword(s):  
Internal Friction ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Low Frequency ◽  
Heat Treatments ◽  
Damping Capacity ◽  
Temperature Hysteresis ◽  
Temperature Spectrum ◽  
Two Peaks ◽  
Very High

Low frequency internal friction of Ti49Ni51 binary and Ti50Ni40Cu10 ternary shape memory alloys has been measured. The effect of solution and aging heat treatments on the damping property was examined. The temperature spectrum of internal friction for TiNi binary alloy consists, in general, of two peaks; one is a transition peak which is associated with the parent-martensite transformation and is rather unstable in a sense that it strongly depends on the frequency and decreases considerably when held at a constant temperature. The other one is a very high peak of the order of 10-2, which appears at around 200K. It appears both on cooling and on heating with no temperature hysteresis, and is very stable. The behavior of the peak is strongly influenced by the heat treatments. The trial of two-stage aging with a purpose of improving the damping capacity has been proved unsatisfactory. TiNiCu has a very high damping, the highest internal friction reaching 0.2, but by quenching from very high temperature, say 1373K, the damping is remarkably lowered. For the realization of high damping the quenching from a certain temperature range around 1173K seems the most preferable condition.

scholarly journals A STUDY OF INTERNAL FRICTION ASSOCIATED WITH THE MARTENSITE TRANSFORMATION AT LOW FREQUENCY

1980 ◽  
Vol 29 (12) ◽  
pp. 1535
Author(s):  
WANG YE-NING ◽  
ZHOU YI-FENG ◽  
ZHANG ZHI-FANG
Keyword(s):  
Internal Friction ◽  
Martensite Transformation ◽  
Low Frequency
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