scholarly journals Sn-0.5Cu(-x)Al Solder Alloys: Microstructure-Related Aspects and Tensile Properties Responses

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 241 ◽  
Author(s):  
Thiago Lima ◽  
Guilherme de Gouveia ◽  
Rudimylla da Silva Septimio ◽  
Clarissa da Cruz ◽  
Bismarck Silva ◽  
...  
Keyword(s):  
Beneficial Effect ◽  
Tensile Properties ◽  
Tensile Tests ◽  
Al Alloys ◽  
Unsteady State ◽  
Dendritic Spacing ◽  
Al Content ◽  
Cu Alloy ◽  
State Growth ◽  
Al Additions

In this study, experiments were conducted to analyze the effect of 0.05 and 0.1 wt.% Al additions during the unsteady-state growth of the Sn-0.5wt.%Cu solder alloy. Various as-solidified specimens of each alloy were selected so that tensile tests could also be performed. Microstructural aspects such as the dimensions of primary, λ1, and secondary, λ2, dendritic arrays, and intermetallic compounds (IMCs) morphologies were comparatively assessed for the three tested compositions, that is, Sn-0.5wt.%Cu, Sn-0.5wt.%Cu-0.05wt.%Al, and Sn-0.5wt.%Cu-0.1wt.%Al alloys. Al addition affected neither the primary dendritic spacing nor the types of morphologies identified for the Cu6Sn5 IMC, which was found to be either globular or fibrous regardless of the alloy considered. Secondary dendrite arm spacing was found to be enlarged and the eutectic fraction was reduced with an increase in the Al-content. Tensile properties remained unaffected with the addition of Al, except for the improvement in ductility of up to 40% when compared to the Sn-0.5wt.%Cu alloy without Al trace. A smaller λ2 in size was demonstrated to be the prime microstructure parameter associated with the beneficial effect on the strength of the Sn-0.5wt.%Cu(-x)Al alloys.

Effect of Trace Added Sn on Mechanical Properties of Al-Zn-Mg Alloy

2013 ◽  
Vol 828 ◽  
pp. 73-80 ◽  
Author(s):  
Sanjoy Sadhukhan ◽  
Molay Kundu ◽  
Manojit Ghosh
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Precipitation Hardening ◽  
Al Alloys ◽  
Good Combination ◽  
Natural Ageing ◽  
Structure And Properties ◽  
Minor Addition ◽  
Cu Alloy ◽  
The Stability

The heat treatable 7xxx series Al alloys (Al-Zn-Mg) show good combination of tensile properties through precipitation hardening. Similar to Al-Cu alloy minor addition of Sn in this alloy also influences its structure and properties. The hardness improves after natural ageing and further improves after duplex ageing. Duplex ageing refines the grains also. SEM-EDX results indicate that β-Sn is present in the form of precipitates. DSC results indicate that Sn suppresses the formation of GP zone and the stability of intermediate η phase is higher.

Effects of Precipitates and Alloying Element on Microstructure and High Temperature Properties of Mg-Al Alloys

2005 ◽  
Vol 475-479 ◽  
pp. 537-540 ◽  
Author(s):  
Yeon Jun Chung ◽  
Kwang Seon Shin
Keyword(s):  
High Temperature ◽  
Tensile Properties ◽  
Casting Machine ◽  
Tensile Tests ◽  
Al Alloys ◽  
Thermally Stable ◽  
Alloying Element ◽  
High Temperature Mechanical Properties ◽  
High Temperature Tensile ◽  
High Temperature Tensile Properties

The effects of precipitates and alloying element on the high temperature tensile properties of Mg-Al alloys were investigated in this study. In order to modify the precipitation behavior and microstructure of Mg-Al alloys, Sr and/or Mm (Misch metal) were added to the Mg-9Al and AZ91 alloys. All test specimens used in this study were die-cast on a 320 ton cold chamber high-pressure die-casting machine and the microstructures of the specimens were examined by optical and scanning electron microscopy. Tensile tests were carried out at room temperature, 150oC and 200oC at a strain rate of 2×10-4/sec. The microstructure analyses revealed that thermally stable MgAlSr and AlMm compounds were precipitated in the Sr and/or Mm added alloys and these compounds suppressed the precipitation of the discontinuous Mg17Al12 phase at grain boundaries. The high temperature mechanical properties of the Mg-Al alloys were found to increase with the addition of Sr and/or Mm. It was concluded that the addition of Sr and/or Mm improved high temperature tensile properties of the Mg-Al alloys by the formation of thermally stable precipitates.

Oxidation of Fe-Al Alloys (5-40 at.% Al) at 700 and 900 °C

2016 ◽  
Vol 879 ◽  
pp. 1245-1250 ◽  
Author(s):  
Vera Marx ◽  
Martin Palm
Keyword(s):  
Steady State ◽  
Rate Constants ◽  
Al Alloys ◽  
Oxidation Behaviour ◽  
Al Content ◽  
Steady State Growth ◽  
Parabolic Rate ◽  
Crystallographic Order ◽  
State Growth ◽  
Increasing Temperature

Fe-Al alloys with Al contents between 5 and 40 at.% Al were oxidised for 1000 h in synthetic air at 700 and 900 °C to determine their oxidation behaviour. The minimum Al content which is necessary for the formation of protective Al2O3 scales decreases with increasing temperature from about 17 at.% Al at 700 °C to about 12 at.% Al at 900 °C. Established parabolic rate constants for the steady state growth of Al2O3 indicate formation of γ-Al2O3 at 700 °C while at 900 °C α-Al2O3 + Θ-Al2O3 scales form. At lower Al contents scales are predominantly formed by Fe2O3 as revealed by GI-XRD. It is also found that the oxidation behaviour is independent of the crystallographic order of the alloys, i.e. whether they are disordered A2 or ordered B2.

Dendritic and eutectic growth of Sn–0.5 wt.%Cu solders with low alloying Al levels

2018 ◽  
Vol 233 (9) ◽  
pp. 1733-1737 ◽  
Author(s):  
Thiago Soares Lima ◽  
Bismarck Luiz Silva ◽  
Amauri Garcia ◽  
Noé Cheung ◽  
José Eduardo Spinelli
Keyword(s):  
Eutectic Growth ◽  
Al Alloys ◽  
Thermal Parameters ◽  
Thermal Gradients ◽  
Dendritic Spacing ◽  
Cooling Rates ◽  
Secondary Dendrite Arm Spacing ◽  
Al Content ◽  
Dendrite Arm Spacing ◽  
The Matrix

The dependences of microstructures on the solidification thermal parameters of Sn–0.5 wt.%Cu, Sn–0.5 wt.%Cu–0.05 wt.%Al, and Sn–0.5 wt.%Cu–0.1 wt.%Al alloys are examined. Ranges of sizes and morphologies of microstructural phases have been quantitatively assessed due to the broad spectra of cooling rates and thermal gradients associated with the experiments. Various types of growth relations are proposed to represent the microstructural progresses. Al addition does not change either the matrix primary dendritic spacing or the spacing between Cu6Sn5 particles. However, it is shown that the secondary dendrite arm spacing, λ2, is greatly affected, increasing with the increase in the Al content. Both globular-type and fibrous-type morphologies typify the Cu6Sn5 intermetallics located in interdendritic zones.

LUVATA C510

Alloy Digest ◽  
2010 ◽  
Vol 59 (3) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Bend Strength ◽  
Cu Alloy

Abstract Luvata C510 is a very common and frequently used alloy. The 5% Sn and 95% Cu alloy is deoxidized with 0.2% P. It is often called CuSn5. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. and bend strength. It also includes information on forming. Filing Code: CU-780. Producer or source: Luvata Sales (USA) Inc.

scholarly journals Microstructure, Hardness, and Tensile Properties of Vacuum Carburizing Gear Steel

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 300
Author(s):  
Wu Chen ◽  
Xiaofei He ◽  
Wenchao Yu ◽  
Maoqiu Wang ◽  
Kefu Yao
Keyword(s):  
Tensile Properties ◽  
Tensile Tests ◽  
Case Depth ◽  
Strain Hardening Exponent ◽  
Austenitizing Temperature ◽  
Vacuum Carburizing ◽  
Experimental Steel ◽  
Strain Behavior ◽  
Carburized Steel ◽  
Vacuum Carburization

We investigated the effects of the austenitizing temperature on the microstructure, hardness, and tensile properties of case-carburized steel after vacuum carburization at 930 °C and then re-austenitization at 820–900 °C followed by oil quenching and tempering. The results show that fractures occurred early with the increase in the austenitizing temperature, although all the carburized specimens showed a similar case hardness of 800 HV0.2 and case depth of 1.2 mm. The highest fracture stress of 1919 MPa was obtained for the experimental steel when the austenitizing temperature was 840 °C due to its fine microstructure and relatively high percentage of retained austenite transformed into martensite during the tensile tests. We also found that the stress–strain behavior of case-carburized specimens could be described by the area-weighted curves of the carburized case and the core in combination. The strain hardening exponent was about 0.4 and did not vary with the increase in the austenitizing temperature. We concluded that the optimum austenitizing temperature was around 840 °C for the experimental steel.

scholarly journals Influence of Mechanical Vibration Moulding Process on the Tensile Properties of TiC Reinforced LM6 Alloy Composite Castings

2011 ◽  
Vol 66-68 ◽  
pp. 1207-1212 ◽  
Author(s):  
Mohd Sayuti ◽  
Shamsuddin Sulaiman ◽  
B.T. Hang Tuah Baharudin ◽  
M.K.A.M. Arifin ◽  
T.R. Vijayaram ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Titanium Carbide ◽  
Tensile Properties ◽  
Mechanical Vibration ◽  
Weight Fraction ◽  
Tensile Tests ◽  
Alloy Matrix ◽  
Remarkable Effect ◽  
Moulding Process ◽  
Particulate Reinforced

Vibrational moulding process has a remarkable effect on the properties of castings during solidification processing of metals, alloys, and composites. This research paper discusses on the investigation of mechanical vibration mould effects on the tensile properties of titanium carbide particulate reinforced LM6 aluminium alloy composites processed with the frequencies of 10.2 Hz, 12 Hz and 14 Hz. In this experimental work, titanium carbide particulate reinforced LM6 composites were fabricated by carbon dioxide sand moulding process. The quantities of titanium carbide particulate added as reinforcement in the LM6 alloy matrix were varied from 0.2% to 2% by weight fraction. Samples taken from the castings and tensile tests were conducted to determine the tensile strength and modulus of elasticity. The results showed that tensile strength of the composites increased with an increase in the frequency of vibration and increasing titanium carbide particulate reinforcement in the LM6 alloy matrix.

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