**4. Material properties (powder)**

Applied material properties in this paper is aluminum alloy, which is AlSi10Mg. Based on ASTM E8M, specimens for compression and tension are made by the DMLS (direct metal laser sintering) 3D printing technique. **Figure 3** shows specimens after tensile test.

**117**

properties of parts.

AlSi10Mg is a casting alloy and powder type. It can be used in the field for the combination of good thermal properties and low weight. **Table 2** contains technical data for AlSi10Mg powder. It shows general process, geometrical data, physical and chemical properties of the parts, mechanical properties of the parts, and thermal

*Technical data for aluminum alloy AlSi10Mg powder (wt = weight, approx. = approximately).*

*Research of Lightweight Structures for Sandwich Core Model*

*Specimens made by aluminum alloy (AlSi10Mg) after tension test.*

Typical achievable part accuracy (μm) ±100 Smallest wall thickness (mm) Approx. 0.3–0.4 Surface roughness, as built, cleaned (μm) Ra 6–10, Rz 30–40 -after micro shot-peening (μm) Ra 7–10, Rz 50–60

/s) 7.4

Fe(≤0.55), Cu(≤0.05), Mn(≤0.45), Mg(0.2–0.45), Ni(≤0.05), Zn(≤0.10), Pb(≤0.05), Sn(≤0.05), Ti(≤0.15)

As built Heat treated

Material composition (wt%) Al (balance), Si (9.0–11.0),

) 2.67

Tensile strength (MPa) In horizontal direction (XY) 460 ± 20 345 ± 10

Elongation at break (%) In horizontal direction (XY) 9 ± 2 12 ± 2

Hardness (HBW) Approx. 119 ± 5 — Fatigue strength (MPa) In vertical direction (Z) Approx. 97 ± 7 —

In vertical direction (Z) 460 ± 20 350 ± 10

In horizontal direction (XY) 270 ± 20 230 ± 20 In vertical direction (Z) 240 ± 20 230 ± 20

In horizontal direction (XY) 75 ± 10 70 ± 10 In vertical direction (Z) 70 ± 10 60 ± 10

In vertical direction (Z) 6 ± 2 11 ± 2

Relative density (%) Approx. 99.85

*DOI: http://dx.doi.org/10.5772/intechopen.86852*

**Figure 3.**

Volume rate (mm3

Density (g/cm3

Yield strength, Rp0.2%(MPa)

(GPa)

**Table 2.**

Modulus of elasticity

Mechanical properties of the parts

Physical and chemical properties of the parts

#### **Figure 3.**

*Truss and Frames - Recent Advances and New Perspectives*

Precision optics F-theta lens; high-speed scanner

7000

Min 4800 × 3600 × 2900

TiCP Grade2

Software EOSTATE Everywhere, EOSPRINT incl. EOS PArameterEditor

Up to 7.0

**250 × 250 × 325**

**Technical data EOS M290**

Focus diameter (μm) 100 Power supply (A/V) 32/400

Dimensions W × D × H System (mm) 2500 × 1300 × 2190

Weight(kg) In approx. 1250

Laser type (W) Yb fiber laser; 40

**Building volume** 

Scanning speed (m/s)

Power consumption

Inert gas supply (hPa)

Recommended installation space

**(mm)**

(kW)

(mm)

**Table 1.**

these, one of the most important factors is building volume and power supply for the laser. Maximum size of volume to make a model is 250 mm × 250 mm × 325 mm. To make a good quality model, volume size must be 200 mm × 200 mm × 300 mm at least. And laser type is Yb fiber laser with 40 Watt, scanning speed is up to 7.0 m/s, and power supply is 32 ampere with 400 Volt. In addition, more information for the equipment such as dimensions, weight, software, applying materials, etc., is described in the table, especially, materials that have been developing continuously. Now they can obtain materials like aluminum alloy, cobalt chrome, nickel alloy, stain-

Max. 8.5/average 2.4/with platform heating up to 3.2

Materials EOS Aluminum AlSi10Mg, EOS CobaltChrome MP1, EOS Maraging Steel MS1,

Optional accessories EOSTATE Monitoring Suite (EOSTATE Laser, EOSTATE PowerBed, EOSTATE

IPCM-M pro, wet separator blasting cabinet

EOS NickelAlloy HX, EOS NickelAlloy IN625, EOS NickelAlloy IN718, EOS StainlessSteel CX, EOS StainlessSteel PH1, EOS StainlessSteel 17-4PH, EOS StainlessSteel 316 L, EOS Titanium Ti64, EOS Titanium Ti64ELI, EOS Titanium

MeltPool, EOSTATE Exposure OT). Comfort Power Module, IPCM-M extra,

Technical data for aluminum alloy is shown in **Table 1** and **3D** printing machine,

Applied material properties in this paper is aluminum alloy, which is AlSi10Mg.

Based on ASTM E8M, specimens for compression and tension are made by the DMLS (direct metal laser sintering) 3D printing technique. **Figure 3** shows speci-

less steel, and titanium alloy. These are based on powder type.

EOS M290, based on DMLS skill.

*Technical data of DMLS equipment.*

mens after tensile test.

**4. Material properties (powder)**

**116**

*Specimens made by aluminum alloy (AlSi10Mg) after tension test.*


#### **Table 2.**

*Technical data for aluminum alloy AlSi10Mg powder (wt = weight, approx. = approximately).*

AlSi10Mg is a casting alloy and powder type. It can be used in the field for the combination of good thermal properties and low weight. **Table 2** contains technical data for AlSi10Mg powder. It shows general process, geometrical data, physical and chemical properties of the parts, mechanical properties of the parts, and thermal properties of parts.
