Effect of melting methods on the corrosion resistance of spring alloy 36NKhTYu

1968 ◽  
Vol 10 (10) ◽  
pp. 822-823
Author(s):  
B. G. Belov ◽  
D. G. Tufanov
Keyword(s):  
Corrosion Resistance ◽  
Spring Alloy ◽  
Alloy 36Nkhtyu

A study of the properties of spring alloy 36NKhTYu after rapid quenching and combined aging

2010 ◽  
Vol 52 (5-6) ◽  
pp. 243-250
Author(s):  
O. M. Khovova ◽  
E. N. Piskunova ◽  
I. O. Dumanskii ◽  
A. I. Plokhikh
Keyword(s):  
Rapid Quenching ◽  
Spring Alloy ◽  
Alloy 36Nkhtyu

N-S 25

Alloy Digest ◽  
1961 ◽  
Vol 10 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
National Standard ◽  
Annealed Condition ◽  
Spring Alloy ◽  
Cobalt Base

Abstract N-S 25 is a cobalt-base high temperature spring alloy. It has exceptional properties at temperatures up to 1800 F in the fully annealed condition. It is recommended to be used at temperatures from 400 to 1400 F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as heat treating and joining. Filing Code: Co-27. Producer or source: National-Standard Company.

Rapid hardening and combined aging of spring alloy 36NKhTYu

2008 ◽  
Vol 50 (1-2) ◽  
pp. 51-58
Author(s):  
O. M. Khovova ◽  
I. O. Dumanskii ◽  
A. I. Plokhikh ◽  
V. G. Leshkovtsev ◽  
M. V. Andreeva ◽  
...  
Keyword(s):  
Rapid Hardening ◽  
Spring Alloy ◽  
Alloy 36Nkhtyu

Microstructures of Ti-1.5 w/o Ni Alloys with Mo and A1 Additions

1975 ◽  
Vol 33 ◽  
pp. 54-55
Author(s):  
Anna C. Fraker
Keyword(s):  
Corrosion Resistance ◽  
Beneficial Effect ◽  
Crevice Corrosion ◽  
Local Corrosion ◽  
Precipitate Size ◽  
Ni Alloys

Small amounts of nickel are added to titanium to improve the crevice corrosion resistance but this results in an alloy which has sheet fabrication difficulties and is subject to the formation of large Ti2Ni precipitates. These large precipitates can serve as local corrosion sites; but in a smaller more widely dispersed form, they can have a beneficial effect on crevice corrosion resistance. The purpose of the present work is to show that the addition of a small amount of Mo to the Ti-1.5Ni alloy reduces the Ti2Ni precipitate size and produces a more elongated grained microstructure. It has recently been reported that small additions of Mo to Ti-0.8 to lw/o Ni alloys produce good crevice corrosion resistance and improved fabrication properties.

Role of Aluminium on the Microstructure and Corrosion Behaviour of Magnesium Prepared by Powder Metallurgy Method

2020 ◽  
Vol 17 (3) ◽  
pp. 8206-8213
Author(s):  
J. Alias
Keyword(s):  
Corrosion Resistance ◽  
Powder Metallurgy ◽  
Corrosion Behaviour ◽  
Corrosion Current ◽  
Optical Microscope ◽  
High Reactivity ◽  
Aluminium Content ◽  
Powder Metallurgy Method ◽  
X Ray Diffraction ◽  
Promising Development

Much research on magnesium (Mg) emphasises creating good corrosion resistance of magnesium, due to its high reactivity in most environments. In this study, powder metallurgy (PM) technique is used to produce Mg samples with a variation of aluminium (Al) composition. The effect of aluminium composition on the microstructure development, including the phase analysis was characterised by optical microscope (OM), scanning electron microscopy (SEM) and x-ray diffraction (XRD). The mechanical property of Mg sample was performed through Vickers microhardness. The results showed that the addition of aluminium in the synthesised Mg sample formed distribution of Al-rich phases of Mg17Al12, with 50 wt.% of aluminium content in the Mg sample exhibited larger fraction and distribution of Al-rich phases as compared to the 20 wt.% and 10 wt.% of aluminium content. The microhardness values were also increased at 20 wt.% and 50 wt.% of aluminium content, comparable to the standard microhardness value of the annealed Mg. A similar trend in corrosion resistance of the Mg immersed in 3.5 wt.% NaCl solution was observed. The corrosion behaviour was evaluated based on potentiodynamic polarisation behaviour. The corrosion current density, icorr, is observed to decrease with the increase of Al composition in the Mg sample, corresponding to the increase in corrosion resistance due to the formation of aluminium oxide layer on the Al-rich surface that acted as the corrosion barrier. Overall, the inclusion of aluminium in this study demonstrates the promising development of high corrosion resistant Mg alloys.

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