scholarly journals Features of the damping capacity of Mn – Cu alloys

2021 ◽  
Vol 344 ◽  
pp. 01012
Author(s):  
Sergey Naumov ◽  
Svetlana Ginne
Keyword(s):  
Sharp Decrease ◽  
Alloying Elements ◽  
Damping Capacity ◽  
Natural Ageing ◽  
Cu Alloys ◽  
The Stability

Data on the damping capacity of Mn – Cu alloys are adduced. The results of studying the influence of alloying elements, natural ageing at temperatures of 293 K, 273 K and 263 K on the stability of the damping capacity of Mn – Cu alloys are presented. The high damping capacity of Mn – Cu alloys decreases by 4 ... 6 times during natural ageing at 293 K, remains during 1,7 years of natural ageing at 273 K and 263 K. The analysis of factors that should be considered responsible for a sharp decrease in the damping capacity of Mn – Cu alloys during natural ageing is submitted.

Hot-hardness comparisons among isostructural Be12X intermetallic compounds

1993 ◽  
Vol 8 (7) ◽  
pp. 1550-1557 ◽  
Author(s):  
S.M. Bruemmer ◽  
B.W. Arey ◽  
J.L. Brimhall ◽  
J.P. Hirth
Keyword(s):  
Sharp Decrease ◽  
Slip Systems ◽  
Processing Conditions ◽  
Dislocation Mobility ◽  
Melting Temperatures ◽  
Brittle Transition ◽  
Metal Atoms ◽  
Macroscopic Plasticity ◽  
The Stability ◽  
Hot Hardness

Hot hardness has been measured in seven isostructural Be12X compounds: Be12Cr, Be12Mn, Be12V, Be12Mo, Be12Ti, Be12Ta, and Be12Nb. All vacuum-hot-pressed (VHP) materials exhibited similar hardness levels (800 to 1000 kg/mm2) at low temperatures (<600 °C), but sharply diverged at higher temperatures. Most compounds showed a sharp decrease in hardness above about one-half their melting temperatures except for Be12Nb and Be12Ti which maintained strength until higher temperatures. Ductile-brittle transition temperatures (DBTT's) of 600, 625, 690, 700, 700, and 850 °C were determined for Be12Cr, Be12Mn, Be12V, Be12Mo, Be12Ti, and Be12Nb, respectively. Hot-isostatically-pressed (HIP) and VHP Be12Nb heats both showed comparable behavior, indicating that the temperature required for macroscopic plasticity is not dependent on processing conditions. Differences in slip characteristics were observed between beryllides with similar melting temperatures, but differing DBTT's. Dislocations were activated on multiple slip systems in Bei2V during compressive deformation at 800 °C. Similar behavior was not observed in Be12Nb until test temperatures above 1000 °C. It is proposed that dislocation mobility may be related to the stability between Be12X and Be17X2 phases. Larger refractory metal atoms such as Nb may form faulted layers related to Be17X2 structures and thereby impede deformation at intermediate temperatures. Smaller atoms such as Cr, Mn, V, and Mo do not form a stable Be17X2 phase and thereby allow enhanced dislocation mobility at these temperatures.

Effect of Alloying Elements on the Strength and Casting Characteristics of High Strength Al-Zn-Mg-Cu Alloys

2005 ◽  
pp. 2539-2542
Author(s):  
Ki Tae Kim ◽  
Jeong Min Kim ◽  
Ki Dug Sung ◽  
Joong Hwan Jun ◽  
Woon Jae Jung
Keyword(s):  
High Strength ◽  
Alloying Elements ◽  
Cu Alloys ◽  
Effect Of Alloying

Structural transformations in Mn?Cu alloys with high damping capacity

1973 ◽  
Vol 15 (2) ◽  
pp. 108-112 ◽  
Author(s):  
A. G. Rakhshtadt ◽  
Yu. K. Favstov ◽  
L. P. Kochetkova
Keyword(s):  
Structural Transformations ◽  
Damping Capacity ◽  
Cu Alloys

Influence of the Al3(Sc,Zr) Dispersoids and the Stretching on the Natural Ageing Behavior of a Binary Al-4 wt%Cu Alloys

2018 ◽  
pp. 1601-1607 ◽  
Author(s):  
Baptiste Rouxel ◽  
Katrin Mester ◽  
Alizera Vahid ◽  
Justin Lamb ◽  
Timothy Langan ◽  
...  
Keyword(s):  
Natural Ageing ◽  
Cu Alloys

scholarly journals Effects of alloying elements (Sn, Cr and Cu) on second phase particles in Zr-Sn-Nb-Fe-(Cr, Cu) alloys

2018 ◽  
Vol 748 ◽  
pp. 745-757 ◽  
Author(s):  
Boran Tao ◽  
Risheng Qiu ◽  
Yifan Zhao ◽  
Yushun Liu ◽  
Xinu Tan ◽  
...  
Keyword(s):  
Alloying Elements ◽  
Second Phase ◽  
Cu Alloys ◽  
Second Phase Particles

The Effect of Alloying Elements on the Stability of Centerline Segregation

2010 ◽  
Vol 297-301 ◽  
pp. 148-153 ◽  
Author(s):  
Mihály Réger ◽  
Balázs Verő ◽  
Ibolya Kardos ◽  
Péter Varga
Keyword(s):  
Carbon Activity ◽  
Middle Part ◽  
Steel Plates ◽  
Alloying Elements ◽  
Centerline Segregation ◽  
Quality Properties ◽  
Continuously Cast ◽  
The Stability ◽  
Hot Rolled

The paper deals with the stability of centerline inhomogenity of continuously cast slabs and hot rolled products. The centerline segregation is a disadvantageous failure of slabs which can affect the quality properties of the final products. During hot rolling of slabs the centerline segregation pattern will become thin and stretch and it can also be detected in the middle part of heavy plates and coils. It is a common experience that the centerline segregation of heavy plates can not be easily decreased by post heat treatment. The pattern of the centerline segregation was modeled physically by preparing a sandwich structure of steel plates with different levels of carbon and alloying elements. Homogenization experiments were performed and the samples were examined metallographically. Diffusional calculations proved the governing role of carbon activity which is influenced by the distribution of alloying elements.

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