Английский язык для инженеров сварочного производства. Гричин С.В - 78 стр.

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78
Fig. 18 Optical micrographs of regions (a), (b) and (c) of the stir nugget.
The location of these regions is identified in macroscopic section presented
above.Optical micrographs showing the microstructure in (a) the base metal;
(b) heat-affected zone; (c) the thermo mechanically affected zone, where
considerable refinement of the silicon has occurred.
Tensile strength
(MPa)
Proof stress
(MPa)
Elongation (%) Fracture local
Joint 150 85 1.6 BM
Weld 179 87 5.3 TMAZ
SN 251 96 14.4 SN
The refinement of silicon and elimination of porosity leads to better
mechanical properties in the weld than in the base plates.
Vocabulary
ductile
гибкий, ковкий, поддающийся обработке
threaded
с резьбой, нарезной
pin цапфа
shoulder буртик, поясок
debris осколки, обломки, обрезки, лом
volumetric объемный
shrinkage усадочная деформация
solute растворенное вещество, раствор
equiaxed равноосный
4 Read the Russian text below and correlate it with the text Friction Stir
Welding (FSW) in the previous activity. Say if it is a good abstract for the
English text. Why? Why not?

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