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the residual stress. Key words: 6063 aluminum alloy; quench sensitivity; hardness; time-temperature-property curve; strengthening phase; heterogeneous precipitation; residual stress 1 Introduction 6063... of the TTP curve for 99.5% of the maximum property, when the transformation time is 10 s, the critical temperature range is determined between approximately 300 °C and 410 °C, and the nose temperature of TTP......
Residue curve maps of ethyl acetate synthesis reactionZHENG Hui-dong(郑辉东), TIAN Hui(田晖), ZOU Wen-hu(邹文虎), HUANG Zhi-xian(黄智贤), WANG Xiao-da(王晓达), QIU Ting(邱挺), ZHAO Su-ying(赵素英), WU Yan-xiang(吴燕翔)(College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, China)Abstract:The residue curve maps are considered as a powerful tool for the preliminary design of reactive......
Evaluating instrumented Charpy impact strain signals using curve fitting equationsM. B. Ali1, 2, S. Abdullah1, M. Z. Nuawi1, A. K. Ariffin1, Z. M. Nopiah1(1. Department of Mechanical and Materials... system. Aluminium 6061-T6 was used to extract strain responses on the striker during Charpy impact testing. Statistical analysis was performed using the I-kaz method, and curve fitting equations based......
J. Cent. South Univ. (2019) 26: 1856-1862 DOI: https://doi.org/10.1007/s11771-019-4139-y A new slope optimization design based on limit curve method FANG Hong-wei(方宏伟)1,2, CHEN Yohchia(陈幼佳)3,4... Abstract: A new method is proposed for slope optimization design based on the limit curve method, where the slope is in the limit equilibrium state when the limit slope curve determined by the slip-line......
J. Cent. South Univ. (2012) 19: 2047-2053 DOI: 10.1007/s11771-012-1243-7 Attenuation-type and failure-type curve models on accumulated pore water pressure in saturated normal consolidated clay... deformation was modified to create an attenuation-type curve model on accumulated pore water pressure in saturated normal consolidation clay. In this model, dynamic strength was introduced and a new parameter......
available yet. Generally, there are two types of time-temperature transformation curves for alloys, i.e. isothermal transformation(IT) curve and CCT curve. These curves contain important information...[6]. Since then the concept of time-temperature property(TTP) has been applied to different alloys. For example, DAVYDOV et al[7, 8] obtained IT and TTP curves of aluminum alloy for studying quench......
University, Shanghai, 200030, China) 摘要:According to ASTM Designation DXXXX Standard Test Method for Determination of Cooling Characteristics of Quenchants by Cooling Curve Analysis with Agitation... and temperature on cooling characteristics of fast speed quenching oil. The results show that this unit can be well used for determining cooling characteristics of quechants at different flow rates......
STUDY ON PCT CURVE FOR Zr-Ni HYDROGEN STORAGE AMORPHOUS ALLOYZHANG Dongming FU Zhengyi Wuhan University of Technology摘 要:<正> Baaed on the comprehensive analysis of hydrogen storage experimental results for Zi-Ni amorphous alloy, the quantitative relationship of PCT curve was established , the calculated results are consistent -with experimental......
J. Cent. South Univ. (2018) 25: 432-447 DOI: https://doi.org/10.1007/s11771-018-3748-1 Prediction of soil–water characteristic curve for Malan loess in Loess Plateau of China LI Ping(李萍)1, LI Tong... characteristic curve (i.e. SWCC) of natural and remoulded Malan loess from soil physical properties, one-point methods for determining the SWCC that are much simpler than experimental methods......
spring curve, the traditional gaugemeter automatic gauge control (GM-AGC) system based on spring equation cannot meet the requirements of practical production. In allusion to this problem, a kind of novel GM-AGC system based on mill stretch characteristic curve was proposed. The error existing in calculating strip thickness by spring equation were analyzed first. And then the mill stretch......