PREVENTION OF THE INTERGRANULAR FRACTURE AT ELEVATED  TEMPERATURES  BY  ADDITION  OF  PHOSPHORUS  TO  A  HIGH  PURITY  Fe0  002% SALLOY

Acta Metallurgica Sinica (English Letters) ›› 1999, Vol. 12 ›› Issue (4): 596-601.

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PREVENTION OF THE INTERGRANULAR FRACTURE AT ELEVATED TEMPERATURES BY ADDITION OF PHOSPHORUS TO A HIGH PURITY Fe0 002% SALLOY

Received:1999-08-25 Revised:1999-08-25 Online:1999-08-25 Published:2009-10-10

Abstract

Abstract: Theeffectof phosphorusonthehotductility andthesegregation ofsulfuratgrain boundariesin high purityironcontaining 0 002 % sulfur werequantitativelyinvestigated bytensiletestat973 K, SEMobservation of fracture surface and scanning Auger electron spectroscopy.Theexperimental resultscan besum marized as follows:(1) addition of phosphorustothe iron remarkablysuppressestheintergranular fractureinduced bythesegregation of sulfur at973 Kandincreasesthe hot ductility;(2) phosphorusstrikingly decreasesthesegregation ofsulfur atgrain boundaries, whichisresponsibleforthesuppressionoftheintergranularfrac tureat973 K;(3) theremarkably decreasedsegregation ofsulfur atgrain boundariesbytheaddition of phosphoruscan beexplained bythesitecompetitioneffectandtherepulsiveinter action at grain boundariesbetweensulfuratomsand phosphorusatoms;(4) sulfurstrikinglysegregatestothevoid surfacesformed on grain boundaries, while phosphorushaslittlesegre gationtothevoid surfaces.

Key words: high purity iron , intergranular fracture, hot ductility, grain boundarysegregation

C. M. Liu1) , K. Abiko2) and M. Tanino2) 1) Schoolof Materials and Metallurgy , Northeastern University ,Shenyang 110006 ,China 2) Institute for Materials Research, Tohoku University ,Sendai980 8579 ,Japan. PREVENTION OF THE INTERGRANULAR FRACTURE AT ELEVATED TEMPERATURES BY ADDITION OF PHOSPHORUS TO A HIGH PURITY Fe0 002% SALLOY[J]. Acta Metallurgica Sinica (English Letters), 1999, 12(4): 596-601.

[1]	Z.X.Yuan, J.Jia, A.M.Guo, D.D.Shen, S.H.Song, J.Liu. INFLUENCE OF TIN ON THE HOT DUCTILITY OF A LOW-CARBON STEEL [J]. Acta Metallurgica Sinica (English Letters), 2003, 16(6): 478-482 .
[2]	H.S.Di, G.Z.Cui, G.D.Wang, X.H.Liu. HOT DUCTILITY OF 304HC STAINLESS STEEL AND THE MODEL OF RESISTANCE TO DEFORMATION [J]. Acta Metallurgica Sinica (English Letters), 2003, 16(2): 97-103 .
[3]	B. N. Qian; J. L. Li; J. T. Guo and B. Z. Wei (1)Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110015, China 2)Shanghai University, Shanghai 200072, China). HAZ CRACKING AND HOT DUCTILITY OF Ni_3AI CONTAINING Zr ALLOY [J]. Acta Metallurgica Sinica (English Letters), 2000, 13(1): 94-97.
[4]	T.D.Xu CentralIron & Steel Research Institute, Departmentof Superalloy ,Beijing 100081 ,China. THE CRITICAL TIME IN TEMPER EMBRITTLEMENT ISOTHERMS OF PHOSPHORUS IN STEELS [J]. Acta Metallurgica Sinica (English Letters), 1999, 12(4): 361-367.
[5]	C. M. Liu1) , K. Abiko2) and M. Tanino2) 1) Schoolof Materials and Metallurgy , Northeastern University ,Shenyang 110006 ,China 2) Institute for Materials Research, Tohoku University ,Sendai980 ,Japan. RELATION BETWEEN THE INTERGRANULAR SEGREGATION OF SAND THE HOT DUCTILITY IN HIGH PURITY Fe SALLOYS [J]. Acta Metallurgica Sinica (English Letters), 1999, 12(4): 637-644.
[6]	LIU Zongchang Baotou Iron and Steel University,China LIU Zongchang Associate Professor,Division of Materials and Heat Treatment,Baotou Iron and Steel University,Baotou,China. INTERGRANULAR FRACTURE OF AS-QUENCHED MARTENSITE IN HIGH CARBON STEELS [J]. Acta Metallurgica Sinica (English Letters), 1990, 3(1): 58-64.

PREVENTION OF THE INTERGRANULAR FRACTURE AT ELEVATED TEMPERATURES BY ADDITION OF PHOSPHORUS TO A HIGH PURITY Fe0 002% SALLOY

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