Acta Metall Sin  1987, Vol. 23 Issue (3): 169-308    DOI:

Current Issue | Archive | Adv Search |

TWO KINDS OF BORON SEGREGATION AT AUSTENITE GRAIN BOUNDARIES

CHU Youyi; HE Xinlai; TANG Li; XU Tingdong; KE Jun (Beijing University of Iron and Steel Technology) (Manuscript received 20 June; 1985; revised manuscript 11 January; 1986)

CHU Youyi; HE Xinlai; TANG Li; XU Tingdong; KE Jun (Beijing University of Iron and Steel Technology) (Manuscript received 20 June; 1985; revised manuscript 11 January; 1986). TWO KINDS OF BORON SEGREGATION AT AUSTENITE GRAIN BOUNDARIES. Acta Metall Sin, 1987, 23(3): 169-308.

Abstract References Related Articles Recommended Metrics Download:  PDF(2702KB)  Export:  BibTeX | EndNote (RIS)       Abstract  It has been considered that the boron segregation at austenite grain boundaries is responsible for the effect of boron addition on the properties of the steel, such as hardenability, creep fracture, etc. By means of particle tracking autoradiograph(PTA) the grain boundary segregation of boron has been investigated in Fe-30% Ni alley, quenched from 550—1200℃ at different cooling rates. It is shown that two kinds of grain boundary segregation, equilibrium and nonequilibrium segregation, caused by different mechanisms take place. The nonequilibrium grain boundary segregation during cooling with boron depleted zone adjacent to the grain boundary is very sensitive to the cooling rate, and can be inhibited by rapid quenching. The temperature effect on these two kinds of grain boundary segregation are different, As the quenching temperature increases, the grain boundary segregation of boron due to equilibrium adsorption decreases, while the nonequilibrium segregation kinetically increases. The nonequilibrium segregation therefore dominates in the specimens quenched from high temperatures; and the equilibrium segregation in those cooled from low temperatures. In this work, the transition temperature lies in the range of 650—750℃, increasing with enhancing cooling rate. Received:  18 March 1987      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1987/V23/I3/169 1 Williams T M, Stoneham A M, Harries D R. Met Sci, 1976; 10: (1) , 14 2 贺信莱,褚幼义,张秀林,佘宗森,李秋萍,尹熙光.金属学报,1977;13:235 3 贺信莱,褚幼义,柯俊.金属学报.1982;18:1 4 He X L(贺信莱),Chu Y Y(褚幼义).J Phys D:Appl Phys.1983:16:1145 5 Hughes J D H, Rogers G T. J Inst Met. 1967; 95: 299 6 Hoch M, Tech. Rep. G, E.-Tm64-7-11, General Electrie, Atomic Products Division, San Jose CA. 1964, 7 贺信莱,褚幼义,唐立,周振新,柯俊.金属学报,(待发表 No related articles found! No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed