METHOD FOR NONDESTRUCTIVE INSPECTION OF THERMO-DEFORMATION TREATMENT OF SEMI-FINISHED PRODUCTS FROM TWO-PHASE TITANIUM ALLOYS FOR OVERHEATING BY X-RAY ANALYSIS Russian patent published in 2017 - IPC G01N23/207 

FIELD: metal processing.

SUBSTANCE: invention can be used for nondestructive inspection of thermo-deformation treatment of semi-finished products from two-phase titanium alloys for overheating. Essence of invention lies in that it comprises selecting a control point and plotting a calibration curve for each type of semi-finished products, obtaining a diffraction spectrum by x-ray photography and processing results for each inspected semi-product, wherein control point selected is a portion of surface deformed during last thermo-deformation treatment, said portion having predominant material flow parallel to surface with deformation degree of not less than 10 % and not more than 50 % with a remote gas-saturated layer, calibration curve used is relationship of ratio of intensities of diffraction lines of α-phase L₁=(101) or L₁=(110) and L₂=(002) to temperature T (T is difference of temperature of full polymorphous transformation (T_pp) and heating temperature for deformation (T_n)), and overheating temperature using given technology is determined from value of ratio of intensities of diffraction lines L₁ and L₂ above calibration curve for upper limit of heating temperature range.

EFFECT: technical result is possibility of nondestructive rapid inspection of thermo-deformation treatment of semi-finished products from two-phase titanium alloys for overheating.

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