Friction stir lap weld-brazing of AA7050 aluminium alloy to Ti6Al4V titanium alloy – Limitations in dissimilar metal joining

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Friction stir lap weld-brazing of AA7050 aluminium alloy to Ti6Al4V titanium alloy – Limitations in dissimilar metal joining. / Grassel, Felix; Klusemann, Benjamin.
In: Manufacturing Letters, Vol. 44, 06.2025, p. 37-41.

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@article{167e071f2994404eb415c39c290b83f3,
title = "Friction stir lap weld-brazing of AA7050 aluminium alloy to Ti6Al4V titanium alloy – Limitations in dissimilar metal joining",
abstract = "Joining of high-strength aluminium and titanium alloys gives new opportunities for cost- and energy-efficient designs especially in the transportation industry. In the present study, friction stir lap joining of AA7050 and Ti6Al4V was conducted, investigating the thermal cycle in the interface via variation of energy input by the spindle rotation rate. Temperature measurements reveal that the interface temperature exceeds the solidus temperature of the aluminium alloy and reached up to 570 °C, so that the process should be classified as semi-solid-state. Additionally, no indication for intermetallic compounds was found. Lap-shear strength of the joint is found to be limited by low diffusion kinetics at low temperatures and liquation cracking at high temperatures, revealing clear indications for the limitations of this specific material combination for the first time.",
keywords = "Friction Stir Welding, Interface, Mechanical Properties, Temperature, Engineering",
author = "Felix Grassel and Benjamin Klusemann",
note = "Publisher Copyright: {\textcopyright} 2025 The Authors",
year = "2025",
month = jun,
doi = "10.1016/j.mfglet.2025.03.005",
language = "English",
volume = "44",
pages = "37--41",
journal = "Manufacturing Letters",
issn = "2213-8463",
publisher = "Society of Manufacturing Engineers",

}

RIS

TY - JOUR

T1 - Friction stir lap weld-brazing of AA7050 aluminium alloy to Ti6Al4V titanium alloy – Limitations in dissimilar metal joining

AU - Grassel, Felix

AU - Klusemann, Benjamin

N1 - Publisher Copyright: © 2025 The Authors

PY - 2025/6

Y1 - 2025/6

N2 - Joining of high-strength aluminium and titanium alloys gives new opportunities for cost- and energy-efficient designs especially in the transportation industry. In the present study, friction stir lap joining of AA7050 and Ti6Al4V was conducted, investigating the thermal cycle in the interface via variation of energy input by the spindle rotation rate. Temperature measurements reveal that the interface temperature exceeds the solidus temperature of the aluminium alloy and reached up to 570 °C, so that the process should be classified as semi-solid-state. Additionally, no indication for intermetallic compounds was found. Lap-shear strength of the joint is found to be limited by low diffusion kinetics at low temperatures and liquation cracking at high temperatures, revealing clear indications for the limitations of this specific material combination for the first time.

AB - Joining of high-strength aluminium and titanium alloys gives new opportunities for cost- and energy-efficient designs especially in the transportation industry. In the present study, friction stir lap joining of AA7050 and Ti6Al4V was conducted, investigating the thermal cycle in the interface via variation of energy input by the spindle rotation rate. Temperature measurements reveal that the interface temperature exceeds the solidus temperature of the aluminium alloy and reached up to 570 °C, so that the process should be classified as semi-solid-state. Additionally, no indication for intermetallic compounds was found. Lap-shear strength of the joint is found to be limited by low diffusion kinetics at low temperatures and liquation cracking at high temperatures, revealing clear indications for the limitations of this specific material combination for the first time.

KW - Friction Stir Welding

KW - Interface

KW - Mechanical Properties

KW - Temperature

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=105004875518&partnerID=8YFLogxK

U2 - 10.1016/j.mfglet.2025.03.005

DO - 10.1016/j.mfglet.2025.03.005

M3 - Journal articles

AN - SCOPUS:105004875518

VL - 44

SP - 37

EP - 41

JO - Manufacturing Letters

JF - Manufacturing Letters

SN - 2213-8463

ER -