Ensayo Houlcroft

TALAT Lecture 4202

Weldability
13 pages, 14 figures
Basic Level
prepared by Ulrich Krüger,
Schweißtechnische Lehr- und Versuchsanstalt Berlin

Objectives:
− describing the important factors governing weldability of aluminium, such as
influence of alloying elements, combinations of base material and filler materials and
edge preparation for welding

Prerequisites:
− basic knowledgein metallurgy of aluminium

Date of Issue: 1994
 EAA - European Aluminium Association

4202 Weldability

Table of Contents

4202

Weldability ......................................................................................................2

4202.01 Weld Cracking Sensitivity........................................................................ 3
Weldability of Aluminium andits Alloys................................................................3
Solidification Types of Aluminium Welds ..............................................................4
Houldcroft Test for Determining the Weld Cracking Sensitivity ............................5
Houldcroft Test with Alloy 6013 T6 (AlMgSiCu) ..................................................5
Results of the HouldcroftTest for various Al Alloys ..............................................6
Cracking Sensitivities of Aluminium Alloys Containing Si and Mg.......................6
Cracking Sensitivities with Different Alloying Elements........................................7
Melting and Solidification Intervals for Wrought Aluminium Alloys.....................7
Cracking Sensitivity as a Function of theSolidification Range ..............................8
Reducing Weld Cracking by Preheating and by Using Suitable Filler Metals ........8
4202.02 Filler Material .......................................................................................... 9
Filler Metals for Aluminium....................................................................................9
4202.03 Joint and Edge Preparation................................................................... 10
Preparation of Surfaces in the Joint Vicinity .........................................................10
Joint Preparation for TIG Welding ........................................................................10
Joint Preparation for MIG Welding .......................................................................114202.04 Literature/References ............................................................................ 13
4202.05 List of Figures............................................................................................ 13

TALAT 4202

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4202.01 Weld Cracking Sensitivity
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Weldability of aluminium and its alloys
Solidification types of aluminium weldsHouldcroft test for determining the weld cracking sensitivity
Houldcroft test with alloy 6013-T6 (AlMgSiCu)
Results of the houldcroft test for various alloys
Cracking sensitivities of aluminium alloys containing Si and Mg
Cracking sensitivities with different alloying elements
Melting and solidification intervals for wrought aluminium alloys
Cracking sensitivity as a function of thesolidification range
Reducing the weld cracking by preheating and by using suitable filler
methods

Weldability of Aluminium and its Alloys
The weldability of aluminum parts covers the aspects of suitability of welding with
respect to the material properties, reliability of design and the manufacturing
possibilities (Figure 4202.01.01).

Weldability of Aluminium and its Alloys
The Weldability ofAluminium Parts Depends on:
* the Welding Properties of the Alloy
Chemical Composition
Metallurgical Properties
Physical Properties

* the Design and Service Requirements
Design
Loading Condition

* the Welding Conditions
Preparation for Welding
Welding Operations
Post-Welding Treatments

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Weldability of Aluminium and its Alloys

4202.01.01

T raining in Aluminium...