SIMS Evaluation of Poly Crystal Boron Nitride Tool Effect in Thermo- Mechanically Affected Zone of Friction Stir Weld Steels

다국어 초록 (Multilingual Abstract)

The effect of the poly crystal boron nitride (PCBN) tool in friction stir weld (FSW) steels was evaluated using thesecondary ion mass spectroscopy (SIMS) technique. This study focused on the quantitative SIMS analysisof impurity boron through a resistive anode encoder (RAE) image. The RAE images were transformed retrospectivedepth profile by profiler. The relative sensitivity factors (RSFs) for boron varied heavily according toby the polarity of secondary voltage and matrix materials. The RAE images of cluster-polyatomic secondaryion species, 11B16O2, properly map the distribution of impurity boron in the thermo-mechanically affected zone(TMAZ) of FSW steels using negative secondary polarity 4.5 kV. A combination of cluster-polyatomic ion,11B16O2 and 56Fe16O provided a good calibration curve by 3 SRMs with the least matrix effect. The boron concentrationsof TMAZ in FSW steels were determined through the calibration curve by taking the correspondingboron concentration value (CB) of the intensity ratio (Ii/Im) from unknown samples. The new SIMS quantificationtechnique of impurity boron from RAE images is found to be effective for a more quantitative understandingof the wear mechanism of the PCBN tool in TMAZ of FSW steels.

참고문헌 (Reference)

1 Ying Li., 271 : 213-, 1999

2 T. Terasaki., 47 : 24-, 2003

3 P. Threadgill., ISOPE 1-7, 2004

4 M. Posada., 2003

5 W. Konig., 162 : 12-, 1993

6 A. Ozekcin., 14 : 284-, 2004

7 T. J. Lienert., 1-5, 2003

8 R. Johnson., 2003

9 P. Konkol, 2003

10 K. Okamoto., 2003

11 강석훈, "Investigation of the Material Flow and Texture Evolution in Friction-Stir Welded Aluminum Alloy" 대한금속·재료학회 15 (15): 1027-1031, 2009

12 JaeNam Kim, "A New Method to Determine Trace Boron Concentration of Iron and Steel by SIMS Direct Ion Image" 대한금속·재료학회 18 (18): 361-369, 2012