The Effect of Interlayer Thickness on Microstructure and Mechanical Properties of TLP Bonding on Dual Phase Steel

Please enable javascript in your browser.

Zahiri, Amir Hassan | 2015

851 Viewed

Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47639 (07)
University: Sharif University of Technology
Department: Materials Science and Engineering
Advisor(s): Ekrami, Ali Akbar
Abstract:
In this study, the effect of the Cu interlayer thickness was studied on St52 steel. Specimens with different thickness of the interlayer, were subjected to 1150 °C at different times. Isothermal solidification was completed for the thickness of the 50 μm, 30 μm, and 10 μm in 30, 25 and 20 minutes. Afterwards, homogenizing and dual-phase heat treatment were used for 75 minutes at 730°C. Optical microscopy and SEM were used to analyze the microstructure of the joints. Mechanical properties of the joints, including micro hardness of different parts of the joint and also shear strength of the joint zone were studied. The results show that after homogenizing treatment, microstructure and harness distribution of all the specimens is more uniform as the distinction was a difficult junction of base metal.The results of the shear strength also show the interlayers with 30 and 50 μm thickness have proper strength by 75.6 and 80 percent of the base metal’s strength, however specimen with 10 μm thickness showed 58.2 percent of the base metal’s strength
Keywords:
Dual-Phase Steels ; Thickness ; Interlayer ; Transient Liquid Phase Boneling (TLPB) ; Film Thickness