LVI.The equilibrium diagram of iron-nickel alloys

Author(s):  
E.A. Owen ◽  
A.H. Sully
2021 ◽  
Vol 22 (1) ◽  
pp. 141-145
Author(s):  
R.P. Ganich ◽  
V.O. Zabludovsky ◽  
V.V. Artemchuk ◽  
Y.V. Zelenko ◽  
R.V. Markul

The paper presents the results of studying the phase composition of iron-nickel alloys obtained by unsteady electrolysis. It was found that the use of a unipolar pulse current leads to a significant increase in the crystallization overvoltage at the crystallization front at the moment of the pulse action, which affects the component composition of the coatings. The phase composition of the alloys formed at the cathode differs from that shown in the iron-nickel equilibrium diagram.


The method of using measurements of magnetic saturation intensity of annealed iron-nickel alloys for the determination of the equilibrium phase boundaries, as demonstrated by Pickles & Sucksmith, has been extended. The phase diagram of the system has been determined accurately between 525 and 365° C. The mechanism of phase segregation from the single-phase a-state has been studied, where it was found that contrary to the usual case, one of the phases crystallizes out in its equilibrium concentration whilst the residue of the alloy progressively and uniformly approaches equilibrium com position. It was possible to study and express quantitatively the rate of attainment of equilibrium , and on evidence obtained in this way the view is based that the lower practical limit of temperature where the equilibrium diagram can be studied by annealing experiments has been reached.


1959 ◽  
Vol 37 (10) ◽  
pp. 1629-1636 ◽  
Author(s):  
J. R. MacEwan ◽  
J. U. MacEwan ◽  
L. Yaffe

The self-diffusion of nickel and the diffusion of Ni63 into iron, cobalt, and two iron–nickel alloys was studied using the technique of decrease in surface activity, The nickel self-diffusion results are compared to previously reported values. Nickel is found to diffuse more slowly than iron in the iron-rich portion of the iron–nickel system. The rate of nickel diffusion increases with increasing nickel content. A comparison is made between the present results for diffusion of Ni63 into iron, cobalt, and nickel with reported values for diffusion of Co60 and Fe59 in the same metals. In each solvent, the magnitudes of the activation energies, Q, are such that QNi > QCo > QFe.


1978 ◽  
Vol 12 (12) ◽  
pp. 1111-1114 ◽  
Author(s):  
Hans Jürgen Grabke ◽  
Else Marie Petersen

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