Characteristics of aging of low-alloy molybdenum-base alloys

Using x-ray diffractometry, a study on the redistribution of impurities in Mo alloys was carried out. The alloys contained the following impurities: 0.004 to 0.08% C, 0.12% Ti, 0.11 to 0.12% Zr, 0.001 O2, 0.003 H/sub 2/, and 0.0003 to 0.0004% N. The alloys were annealed 1 h at 1000 deg C (starting state), and then annealed in a vacuum furnace at temperatures from 1000 to 1500 deg C for another h. Changes in the lattice period of solid-impurity solution were followed as a function of the annealing temperature at various sample depths. Alloy breakdown with precipitation of the carbide phases ZrC and Mo/sub 2/C occurs only in surface layers of the material, and hinders recrystallization. (tr-auth)