CONTROLLED PRE-CORROSION ATTACK AND ULTRASONIC FATIGUE ENDURANCE OF TITANIUM ALLOY TI–6AL–4V

Authors

  • ISHVARI FERNANDA ZUÑIGA TELLO UNIVERSITY OF MICHOACAN (UMSNH), MEXICO
  • GONZALO MARIANO DOMINGUEZ ALMARAZ UNIVERSITY OF MICHOACAN (UMSNH), MEXICO
  • MANUEL GUZMAN TAPIA UNIVERSITY OF MICHOACAN (UMSNH), MEXICO
  • JORGE LUIS AVILA AMBRIZ UNIVERSITY OF MICHOACAN (UMSNH), MEXICO

Keywords:

ULTRASONIC FATIGUE, TITANIUM ALLOY, CORROSION PITTING, INFRARED IMAGES, CRACK INITIATION AND PROPAGATION.

Abstract

ULTRASONIC FATIGUE TESTS WERE CARRIED OUT ON TITANIUM ALLOY TIÂ6ALÂ4V ON THE BASE MATERIAL AND THE PRE-CORRODED SPECIMEN TO ASSESS THE PRE-CORROSION EFFECT ON THE FATIGUE LIFE OF THIS ALLOY. THE PRE-CORROSION WAS OBTAINED BY IMMERSION OF SPECIMENS IN AN ACID SOLUTION: HYDROCHLORIC ACID WITH 1.4 OF PH DURING 8 AND 16 MINUTES. ALL ULTRASONIC FATIGUE TESTS WERE PERFORMED FOLLOWING A PREDETERMINED SEQUENCE FOR THE START APPLIED LOAD. INFRARED IMAGES WERE TAKEN AT THE NECK SECTION OF SPECIMENS DURING ULTRASONIC TESTING, REVEALING THAT TEMPERATURE IS HIGHER FOR THE SPECI-MENS WITH PRE-CORROSION AND IT INCREASES WITH THE TIME OF PRE-CORROSION. IT WAS OBSERVED THAT PITS GENERATED BY PRE-CORROSION ARE ASSOCIATED WITH STRESS CONCENTRATION, TEMPERATURE INCREASE AND FATIGUE ENDURANCE DECREASE. FRACTURE SURFACES WERE ANALYZED TO DETERMINE THE CRACK INITIATION AND PROPAGATION AND THE STRESS INTENSITY FACTOR RANGE THRESHOLD ÏKTH WAS OBTAINED FOR BOTH: THE PRE-CORRODED AND NON PRE-CORRODED SPECIMENS.

Author Biographies

ISHVARI FERNANDA ZUÑIGA TELLO, UNIVERSITY OF MICHOACAN (UMSNH), MEXICO

PH.D. STUDENT

GONZALO MARIANO DOMINGUEZ ALMARAZ, UNIVERSITY OF MICHOACAN (UMSNH), MEXICO

×CORRESWPONDING AUTHOR

MANUEL GUZMAN TAPIA, UNIVERSITY OF MICHOACAN (UMSNH), MEXICO

PH.D. STUDENT

JORGE LUIS AVILA AMBRIZ, UNIVERSITY OF MICHOACAN (UMSNH), MEXICO

PH.D. STUDENT

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Published

2017-01-09

Issue

Vol. 14 No. 03 (2017)

Section

Articles

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