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Effect of heat treatment conditions on ballistic behaviour of various zones of friction stir welded magnesium alloy joints
- Source :
- Transactions of Nonferrous Metals Society of China. 31:156-166
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Ballistic behaviour of different zones of post-weld heat-treated (PWHT) magnesium alloy (AZ31B) target against 7.62 mm × 39 mm armour-piercing (AP) projectile with a striking velocity of (430±20) m/s was determined. Magnesium alloy (AZ31B) welded joints were prepared by using friction stir welding (FSW) process and subjected to different heat treatment conditions. The microhardness values of non-heat-treated and heat-treated FSW joints were investigated. The results indicated that PWHT process (250 °C, 1 h) has improved the microhardness of heat-treated FSW joints. Scanning electron microscope (SEM) microstructure showed that heat treatment has caused the formation of fine α-Mg grains and tiny precipitates and made the dissolution of β-Mg17Al12 phase into the Mg matrix. The ballistic behaviour of PWHT zones was estimated by measuring the depth of penetration (DOP) of the projectile. Lower DOP value was observed for the base metal zone (BMZ) of a heat-treated welded joint. Post ballistic SEM examinations on the cross-section of all three zones of crater region showed the formation of adiabatic shear band (ASB).
- Subjects :
- 010302 applied physics
Materials science
Scanning electron microscope
Metals and Alloys
02 engineering and technology
Welding
021001 nanoscience & nanotechnology
Geotechnical Engineering and Engineering Geology
Condensed Matter Physics
Microstructure
01 natural sciences
Indentation hardness
law.invention
Adiabatic shear band
law
0103 physical sciences
Materials Chemistry
Friction stir welding
Magnesium alloy
Composite material
0210 nano-technology
Joint (geology)
Subjects
Details
- ISSN :
- 10036326
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Transactions of Nonferrous Metals Society of China
- Accession number :
- edsair.doi...........395e567ad6e0b79ed53a3dbf779052e9