Research on mechanical properties of aluminum alloys used in automotive industry

• Autorzy: Peta K. , Siwak P. , Grochalski K.

Identyfikatory

DOI

10.15199/28.2017.3.1

Warianty tytułu

PL

Badania właściwości mechanicznych stopów aluminium stosowanych w przemyśle motoryzacyjnym

• Języki publikacji: EN

Abstrakty

EN

The paper presents one of the most important mechanical properties of aluminium alloys used in the automotive industry, which mainly determine the material resistance to mechanical loads. Samples were made of aluminium alloys from the 3xxx series (core) and 4xxx series (clad). The latter material layer begins to melt at the brazing temperature (582°C) and forms brazed joints between the surfaces of the base sheets. Commonly, these alloys are used as aluminium brazing sheets and applied in automotive to heat exchangers manufacturing, i.e. radiators, condensers, evaporators, heaters, oil coolers and charge air coolers. Samples of these materials were subjected to mechanical property measurements. In order to assess the changes in the materials during their life cycle, the properties after the manufacturing process and the exploitation tests were compared. Therefore, brazing process was realized in N2 controlled atmosphere. Moreover, one of the most important investigations in terms of the heat exchangers working conditions simulation which is resistance to thermal shocks, was performed. The material working conditions indicate that they should comply with above test requirements, including liquid contact, whose temperature range may refer to 0÷90°C. Particular attention was focused on properties such as Martens hardness, Vickers hardness, Young`s modulus and plastic strain, which have significant role in evaluation of product performance and improving its lifetime. For the measurements, a Fischer Picodentor HM 500 nanoindenter equipped with a Vickers indenter was used. The main advantages of the nanoindentation technique are the accurate and reliable results which might optimize heat exchanger. Furthermore, an optical microscopy was applied to analyse the indentations on the sample surfaces.

PL

W pracy omówiono ważniejsze właściwości mechaniczne stopów aluminium stosowanych w przemyśle motoryzacyjnym, w tym w produkcji samochodowych wymienników ciepła. Szczególną uwagę zwrócono na takie właściwości, jak: twardość Martensa, twardość Vickersa, moduł Younga i odkształcenie plastyczne. Decydują one o odporności materiału na działanie obciążeń mechanicznych, natomiast ich analiza ma znaczenie w ocenie jakości finalnej wyrobu. Głównym celem pracy było porównanie właściwości mechanicznych stopów aluminium po procesie wytwarzania oraz po próbie wytrzymałościowej, aby zaobserwować zmiany właściwości materiałów podczas ich pracy.

Słowa kluczowe

EN

aluminium alloys; automotive; heat exchanger; mechanical properties; Young modulus; nanoindentation

PL

stopy aluminium; motoryzacja; wymienniki ciepła; właściwości mechaniczne; moduł Younga; nanoindentacja

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 2017
• Tom: Vol. 38, nr 3
• Strony: 114--118
• Opis fizyczny: Bibliogr. 20 poz., fig., tab.

Twórcy

autor

Peta K.

• Institute of Mechanical Technology, Poznan University of Technology, Poznań

autor

Siwak P.

• Institute of Mechanical Technology, Poznan University of Technology, Poznań

autor

Grochalski K.

• Institute of Mechanical Technology, Poznan University of Technology, Poznań

Bibliografia

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• [16] Wang Y., Qu S., Gai Y., Dong S., Liang Y.: Residual strains of aluminium alloy characterized by nanoindentation. Transactions of Nonferrous Metals Society of China 19 (2009) 767÷771.
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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).