AN INTERNAL FRICTION STUDY OF THE MECHANISM OF IMPROVEMENT OF THE PROPERTIES OF Fe-Cr-Al ALLOYS BY THE ADDITION OF A SMALL AMOUNT OF RARE EARTH ELEMENTS

1981 ◽  
Vol 42 (C5) ◽  
pp. C5-469-C5-474
Author(s):  
Li Wern-bin ◽  
Yang Guo-ping ◽  
Li Cheng-hsiu ◽  
Liu Zheng-qun
Keyword(s):  
Rare Earth ◽  
Internal Friction ◽  
Rare Earth Elements ◽  
Al Alloys ◽  
Friction Study

Internal Friction Study of Vacancy Hardening in B2 Fe Al Alloys

2012 ◽  
Vol 184 ◽  
pp. 81-86 ◽  
Author(s):  
Yoichi Nishino ◽  
Kazuya Ogawa ◽  
H. Tanaka
Keyword(s):  
Plastic Strain ◽  
Internal Friction ◽  
Strain Amplitude ◽  
Peak Height ◽  
Dislocation Motion ◽  
Al Alloys ◽  
Anomalous Increase ◽  
Internal Friction Peak ◽  
Quenching Temperature ◽  
Friction Study

nternal friction behaviour of B2 FeAl alloys has been examined to reveal the correlation of the microplasticity and thermal vacancies. The internal friction peak for Fe60Al40 appears at around 550 K, and the peak height increases with increasing quenching temperature. The curves of internal friction against the strain amplitude shift to larger strain amplitude as the quenching temperature increases. Analysis of the amplitude-dependent internal friction provides the plastic strain of the order of 10-9 as a function of effective stress on dislocation motion. It is found that the microflow stress at the plastic strain of 1×10-9 increases linearly with the square root of the net peak height. Remarkably, the microflow stress decreases with rising temperature but turns to increase above 500 K when measured after holding for 1 h at test temperatures. The anomalous increase in the microflow stress is caused by the creation of thermal vacancies at intermediate temperatures.

scholarly journals EFFECT OF RARE EARTH ELEMENTS ON THE INTERNAL FRICTION OF IRON

1974 ◽  
Vol 23 (4) ◽  
pp. 68
Author(s):  
YOU MIAO ◽  
YANG JI-XIAN ◽  
CHEN DE-YUAN
Keyword(s):  
Rare Earth ◽  
Internal Friction ◽  
Rare Earth Elements

A Low Environmental Load Modifying and Refining Treatment of Casting Al Alloys with RE

2005 ◽  
Vol 475-479 ◽  
pp. 429-432
Author(s):  
Xie Min Mao ◽  
Zhi Ying Ouyang ◽  
Jin Long Zhang
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Environmental Pollution ◽  
Conventional Treatment ◽  
Al Alloys ◽  
Environmental Load ◽  
Research Results ◽  
Melt Treatment ◽  
New Treatment

Melt treatment is one of the most important processes in the production of casting Al alloys. It is also a source of environmental pollution. A green and effective melt treatment with low environmental load (EI), which added with RE (Rare Earth) elements, was investigated in the paper. The research results show that this new treatment can modify, refine and purify the casting Al alloys simultaneously. Compared with the conventional treatment, the process is simplified, the metallurgic quality and mechanical properties are improved, and the environmental pollution which existed in the conventional treatment is solved thoroughly, so represented its wide applicative values.

INVESTIGATION OF THE DISTRIBUTION AND THE STATE OF SMALL AMOUNT OF RARE EARTH ELEMENTS IN PURE IRON BY THE METHOD OF INTERNAL FRICTION

1981 ◽  
Vol 42 (C5) ◽  
pp. C5-463-C5-468
Author(s):  
Li Wern-bin ◽  
Liu Zheng-qun ◽  
Yang Quo-ping ◽  
Li Cheng-hsiu ◽  
Zhang Bin
Keyword(s):  
Rare Earth ◽  
Internal Friction ◽  
Rare Earth Elements ◽  
Pure Iron ◽  
The State
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