News Column

Study Findings from Institute of Modern Physics Provide New Insights into Nanoindentation (Slow positron beam and nanoindentation study of...

August 15, 2014



Study Findings from Institute of Modern Physics Provide New Insights into Nanoindentation (Slow positron beam and nanoindentation study of irradiation-related defects in reactor vessel steels)

By a News Reporter-Staff News Editor at Science Letter -- Research findings on Nanoindentation are discussed in a new report. According to news reporting originating from Lanzhou, People's Republic of China, by NewsRx correspondents, research stated, "In order to understand the nature of the hardening after radiation in reactor vessel steels, China A508-3 steels were implanted by proton with an energy of 240 keV up to 2.5 x 10(16), 5.5 x 10(16), 1.1 x 10(17), and 2.5 x 10(17) ions cm(-2), respectively. Vacancy type defects were detected by energy-variable positron beam Doppler broadening technique and then nanoindentation measurements were performed to investigate proton-induced hardening effects."

Our news editors obtained a quote from the research from the Institute of Modern Physics, "The results showed that S-parameter increased as a function of positron incident energy after irradiation, and the increasing rate of the S-parameter near the surface was larger than that in the bulk due to radiation damage. The size of vacancy type defects increased with dose. Irradiation induced hardening was shown that the average hardness increased with dose."

According to the news editors, the research concluded: "Moreover a direct correlation between positron annihilation parameter and hardness was found based on Kasada method."

For more information on this research see: Slow positron beam and nanoindentation study of irradiation-related defects in reactor vessel steels. Journal of Nuclear Materials, 2014;451(1-3):249-254. Journal of Nuclear Materials can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Nuclear Materials - www.elsevier.com/wps/product/cws_home/505671)

The news editors report that additional information may be obtained by contacting X.B. Liu, Chinese Academy Sci, Inst Modern Phys, Lanzhou 730000, People's Republic of China. Additional authors for this research include R.S. Wang, J. Jiang, Y.C. Wu, C.H. Zhang, A. Ren, C.L. Xu and W.J. Qian (see also Nanoindentation).

Keywords for this news article include: Asia, Lanzhou, Nanotechnology, Nanoindentation, Emerging Technologies, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Science Letter


Story Tools






HispanicBusiness.com Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters