Microstructural and Mechanical Characterization of Sintered …
411
Baradeswaran et al. find that Al7075 is reinforced with B 4 C; hardness value
increases considerably due to increases in strain energy because of particle dispersion
at peripheral region of the composite [14]. Jayavelu et al. investigated wear resistance
of two composites and aluminum alloy fabricated through powder metallurgy using
dry sliding wear. Of these, aluminum alloy with titanium diboride provides higher
wear resistance and low coefficient of friction [15]. Basakaran et al. reported in dry
sliding wear analysis of insitu casting fabricated Al7075 with TiC through Taguchi
method that elevated temperature pin undergo plastic deformation due to formation of
oxide layer which is reason for gentle sliding of wear parts which provides excellent
wear resistance [16].
With these studies, an attempt has been made to synthesis an aluminum AA2014
alloy from elemental powders, a composite of AA2014 with 5 wt%—TiB 2 and a
HMMC AA2014 with 5%—TiB 2 and 5%—Al 2 O 3 through powder metallurgy route.
Green, sintered and theoretical densities of samples-I, II and III were calculated and
compared. Samples-I, II, III were undergone vacuum hot press condition in order
improve the existing mechanical properties. The results are compared with all three
samples.
2 Materials and Methods
Materials used in the present study were elemental powders of aluminum alloy
AA2014, TiB 2 and Al 2 O 3 , and their compositions were tabulated in Tables 1, 2,
and 3.
Aluminum (67 µm) from M/s Metal Powder Company, Thirumangalam, copper
(45 µm) from M/s Innomet powders, Hyderabad, magnesium (µm) from M/s Jagada
Industries, Virudhunagar, chromium (45 µm), and manganese (37 µm) from M/s
Table 1 Constituent of AA2014 [17]
Element
Cu
Si
Mg
Mn
Fe
Al
Weight %
4.0
0.8
0.5
0.8
0.7
Balance
Table 2 Constituent of TiB 2 powders [18]
Element
Ti
B
O
C
Fe
N
Weight %
67.60
31.04
0.45
0.25
0.09
0.26
Table 3 Constituent of Al 2 O 3 particles [19]
Element
Alumina
Fe 2 O 3
TiO 2
CaO
Other magnetic materials
Weight %
93.0
0.80
1.80
1.10
0.20
411
Baradeswaran et al. find that Al7075 is reinforced with B 4 C; hardness value
increases considerably due to increases in strain energy because of particle dispersion
at peripheral region of the composite [14]. Jayavelu et al. investigated wear resistance
of two composites and aluminum alloy fabricated through powder metallurgy using
dry sliding wear. Of these, aluminum alloy with titanium diboride provides higher
wear resistance and low coefficient of friction [15]. Basakaran et al. reported in dry
sliding wear analysis of insitu casting fabricated Al7075 with TiC through Taguchi
method that elevated temperature pin undergo plastic deformation due to formation of
oxide layer which is reason for gentle sliding of wear parts which provides excellent
wear resistance [16].
With these studies, an attempt has been made to synthesis an aluminum AA2014
alloy from elemental powders, a composite of AA2014 with 5 wt%—TiB 2 and a
HMMC AA2014 with 5%—TiB 2 and 5%—Al 2 O 3 through powder metallurgy route.
Green, sintered and theoretical densities of samples-I, II and III were calculated and
compared. Samples-I, II, III were undergone vacuum hot press condition in order
improve the existing mechanical properties. The results are compared with all three
samples.
2 Materials and Methods
Materials used in the present study were elemental powders of aluminum alloy
AA2014, TiB 2 and Al 2 O 3 , and their compositions were tabulated in Tables 1, 2,
and 3.
Aluminum (67 µm) from M/s Metal Powder Company, Thirumangalam, copper
(45 µm) from M/s Innomet powders, Hyderabad, magnesium (µm) from M/s Jagada
Industries, Virudhunagar, chromium (45 µm), and manganese (37 µm) from M/s
Table 1 Constituent of AA2014 [17]
Element
Cu
Si
Mg
Mn
Fe
Al
Weight %
4.0
0.8
0.5
0.8
0.7
Balance
Table 2 Constituent of TiB 2 powders [18]
Element
Ti
B
O
C
Fe
N
Weight %
67.60
31.04
0.45
0.25
0.09
0.26
Table 3 Constituent of Al 2 O 3 particles [19]
Element
Alumina
Fe 2 O 3
TiO 2
CaO
Other magnetic materials
Weight %
93.0
0.80
1.80
1.10
0.20