The phase boundaries of the gamma loop in the irontin system have been determined by X-ray diffraction. In addition, lattice-parameter measurements have been made on homogeneous α-Fe alloys containing up to 7 wt.-% (3.4 at.-%) Sn. The solubility limits of the γ loop at 1100°C (1373K) have been found to be 0.71 and 1.29 at.-% Sn for the γ/(α + γ) and α/(α + γ) phase boundaries, respectively. Up to ∼ 1225°C (1500K), the solubility limits agree well with those thermodynamically computed by Hillert, Wada, and Wada (J. Iron Steel Inst., 1967, 205, 539); above 1225°C (1498 K), the experimentally determined solubility limits differ from the calculated values.
Get full access to this article
View all access options for this article.
References
1.
WeyerF. and ReineckenW., Mitt. K-W-Inst. Eisenforsch., 1925, 7, 69.
2.
JonesW. D., J. Iron Steel Inst., 1934, 130, 435.
3.
HillertM., WadaT., and WadaH., ibid., 1967, 205, 539.
4.
EhretW. F. and WestgrenA. F., J. Amer. Chem. Soc., 1933, 55, 1339.
5.
RomigO. E., Metal Progress, 1942, 42, 900.
6.
ZenerC., Trans. Amer. Inst. Min. Met. Eng., 1946, 167, 513.
7.
JonesF. W. and PumphreyW. I., J. Iron Steel Inst., 1949, 166 121.
