Weld line behaviour during uniaxial tensile testing of tailor welded blanks

• Autorzy: Ciubotariu V. , Brabie G.

Warianty tytułu

PL

Zachowanie się spoiny liniowej w próbie jednoosiowego rozciągania w elementach typu tailor blanks

• Języki publikacji: EN

Abstrakty

EN

The quality of weld line in a tailor welded blank (TWB) is an important factor that can affect the quality of the deep drawing process and resulted drawn parts. Hence, the behaviour of weld line during forming must be made with responsibility and by applying different physical testing methods in order to obtain useful and accurate information. For example, the mechanical properties of TWB and weld line, that give information concerning yield limit and ultimate strength, can be generally determined by applying the following techniques: parallel tensile testing or normal tensile testing. But, since the welding process can induce specific properties in the weld joint and heat - affected zone, the simple tensile test is not enough to obtain the needed information concerning such properties. The present paper investigates the behaviour and mechanical properties of the weld line in a tailor welded blank during and after its tensile testing by applying the following testing methods: parallel tensile test, micro-hardness testing, thermography, EDX and microscopy.

PL

Jakość spoiny w blachach typu tailor blanks jest istotnym parametrem, który może wpływać na przebieg procesu tłoczenia i jakość wyrobu. Zachowanie się spoiny podczas formowania musi być określone w różnych testach, aby uzyskać przydatne informacje. W artykule przedstawiono badania dotyczące zachowania się i właściwości mechanicznych spoiny liniowej w blachach typu tailor blanks podczas i po próbie rozciągania stosując między innymi pomiary mikrotwardości i mikrostruktury.

Słowa kluczowe

EN

tailor welded blank; weld line; parallel tensile test; thermography; microscopy; microhardness testing; EDX testing

PL

próba rozciągania; termografia; mikroskopia; badania mikrotwardości

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2011
• Tom: Vol. 11, no 4
• Strony: 811--824
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Ciubotariu V.

autor

Brabie G.

• University of Bacau, 157 Marasesti Street, 5500 Bacau, Romania

Bibliografia

• [1] Abdullah K., a.o.: Tensile testing for weld deformation properties in similar gage TWBs using the rule of mixture, J. of Mat. Proc. Tech., Vol. 112, 2001, pp. 91-97.
• [2] Brabie G., Chirita B., Chirila C.: Determination of the weld metal properties and behaviour in the case of tailor-welded blanks using the parallel tensile test and image-analysis method, Archives of Civil and Mechanical Engineering, Vol. 4, No. 2, 2004, pp. 41-47.
• [3] Kinsey B., Cao J.: An analytical model for tailor welded blanks forming, Journal of Manufacturing Science and Engineering, Vol. 125, No. 2, 2001, pp. 344-351.
• [4] Lee K.J, Chun B.K.: Numerical investigation of TWB forming and springback, Simulation of Materials Processing: Theory, Methods and Applications, ed. Mori, 2001.
• [5] Min K.B., Kang S.S., Kim K.S.: A study on resistance welding in steel sheets using a tailor welded blank (1st report). Evaluation of upset weldability and formability, Journal of Materials Processing Technology, Vol. 101, 2000, pp. 186-192.
• [6] Park K.C., Shan S., Kim K.S., Kwon O.: Forming characteristics of laser welded tailored blanks, Journal of the Korean Society for Technology of Plasticity, Vol. 7, 1998, pp. 23-35.
• [7] ASTM E384-09: Standard test methods for microidentation hardness of materials.
• [8] ASTM E8/E8M - 09: Standard test methods for tension testing of metallic materials.
• [9] ISO 18434-1 2008: Condition monitoring and diagnostics of machines - Thermography. Part 1: General procedures.