PROGRESS UPDATE WORK PACKAGE 1LAURA CORDOVA GONZALEZ

AGENDA

1. INTRODUCTION

2. RESEARCH PLANNING

3. BSc. PROJECTS AT NLR - RESULTS

AGENDA

1. INTRODUCTION

2. RESEARCH PLANNING

3. BSc. PROJECTS AT NLR - RESULTS

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INTRODUCTIONCONNECTION BETWEEN THE WORKING PACKAGES

WP1

WP3WP2

• Feasibility of part production on location

• Failure behavior & life prediction

• Update in development of technology

• Maintainability (& repair)

• Supply chain network design

• Facility location & shipping

• (Re)design stage impact

• Scoring method

• Part consolidation

• Resource pooling

l.cordovagonzalez@utwente.nl 13/12/2016

Bram Westerweel Nils Knofius

Laura Cordova

AGENDA

1. INTRODUCTION

2. RESEARCH PLANNING

3. BSc. PROJECTS AT NLR - RESULTS

6

RESEARCH METHODOLOGY

Base powders properties and influence on

material behavior

Technology, process

parameters and post-processing

Maintainability (& repairing)

l.cordovagonzalez@utwente.nl 13/12/2016

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RESEARCH TOPIC I: PRODUCING ON LOCATIONMOISTURE INFLUENCE FOR AM METAL POWDERS

Characterization of metal powder for AM

• Moisture influence on mechanical performance (Layer deposition in SLM and powder flow)

• Rheological properties

• Chemical reaction (irreversible effect) – (XPS / LECO)

Influence of drying process and moisture on quality / properties

• Analysis of builds with as-received and dried powders

• Porosity / CT-Scanning

• Density

• Hardness

• Microstructure

l.cordovagonzalez@utwente.nl 13/12/2016

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RESEARCH TOPIC II & III: SELECTING THE CORRECT PATHPOTENTIAL OF AM IN PRODUCING METAL PARTS

II: Selection of suitable AM

techniques

Post processing

Materials selection

Maintenance

RepairingPrinting new parts

III: Study of post-processing

techniques to optimize the

life prediction and

preventive maintenance

Cases studies in industry of different type of parts to evaluate performance of

developed approach

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CASE STUDIESPARTNERS INVOLVEMENT

• What type of parts can be selected?

• Which are the important properties to fulfill the requirements?

• Is there the possibility of printing on location?

• What AM technique and post-processing?

• Can be printed in the same materials? And design?

• What is the result in terms of performance and economical benefits?

• Is there a quantifiable impact in the maintenance actions?

AGENDA

1. INTRODUCTION

2. RESEARCH PLANNING

3. BSc. PROJECTS AT NLR - RESULTS

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BSc. PROJECTS I – STEFAN SMITMOTIVATION

I- Effect of layer thickness on Inconel 718 manufactured with SLM:

Influence of process parameters (layer thickness) when producing SLM parts

with optimized conditions

Measurement of properties such as: porosity level, microstructure and melt

pool size, hardness and density

13/12/2016

Sample preparation

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BSc. PROJECTS I – STEFAN SMIT

Effect of layer thickness on Inconel 718 manufactured with SLM:

30μm 50μm

- Melt pool size

Microstructure Hardness

Microstructure with Kalling’s reagent no. 2

l.cordovagonzalez@utwente.nl 13/12/2016

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BSc. PROJECTS I – STEFAN SMIT

Effect of layer thickness on Inconel 718 manufactured with SLM:

Density Porosity

l.cordovagonzalez@utwente.nl 13/12/2016

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BSc. PROJECTS II – STEFAN SMITCONCLUSIONS

I- Effect of layer thickness on Inconel 718 manufactured with SLM:

Comparable density and porosity

Differences in microstructure -> hardness

Next steps -> study post-processing techniques

l.cordovagonzalez@utwente.nl 13/12/2016

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BSc. PROJECTS II – NIELS VLUTTERTMOTIVATION

II- The absorption of moisture by metal powder in a humid

environment:

Impact of environmental conditions in the quality of metal powders for AM

Measurement of moisture content in three different alloys

Study of chemical composition of the most critical alloy in terms of reaction to

humidity

l.cordovagonzalez@utwente.nl 13/12/2016

Humidity 90%

Time in chamber 8 weeks

Time testing 45 min

Temperature 150C

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BSc. PROJECTS II – NIELS VLUTTERT

The absorption of moisture by metal powder in a humid environment:

Mois

ture

conte

nt

Moisture analysis

0,186%

Material Starting w % moist. % n mois.

AlSi10Mg 5,7255 0,1869% 0,5099%

Ti6Al4V 9,6952 0,1031% 0,1662%

Inc718 15,6232 0,0499% 0,0499%

Inconel Titanium

Aluminum

l.cordovagonzalez@utwente.nl 13/12/2016

Mass (g)

Time (min)

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BSc. PROJECTS II – NIELS VLUTTERT

The absorption of moisture by metal powder in a humid environment:

Composition analysis with XPS

l.cordovagonzalez@utwente.nl 13/12/2016

Oxygen

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BSc. PROJECTS II – NIELS VLUTTERTCONCLUSIONS

II- The absorption of moisture by metal powder in a humid

environment:

Moisture content is difficult to measure in metal powder by thermo-

gravimetrical analysis (low accuracy)

Variability in particles chemical composition

Next steps -> analyze builds

l.cordovagonzalez@utwente.nl 13/12/2016

THANK YOU

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