Acta Metall Sin  1985, Vol. 21 Issue (2): 53-142    DOI:

Current Issue | Archive | Adv Search |

THE BEHAVIOUR OF CARBON IN A Ni-BASE SUPERALLOY GH99 AND ITS INFLUENCE ON STRESS-RUPTURE PROPERTIES

YANG Nansen;WEI Yuhuan Central Iron and Steel Research Institute;Ministry of Metallugical Industry;Beijing;YU Wanzhong;DONG Diansheng Fushun Steel Works

YANG Nansen;WEI Yuhuan Central Iron and Steel Research Institute;Ministry of Metallugical Industry;Beijing;YU Wanzhong;DONG Diansheng Fushun Steel Works. THE BEHAVIOUR OF CARBON IN A Ni-BASE SUPERALLOY GH99 AND ITS INFLUENCE ON STRESS-RUPTURE PROPERTIES. Acta Metall Sin, 1985, 21(2): 53-142.

Abstract References Related Articles Recommended Metrics Download:  PDF(2355KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The carbon,whether more or less,held in solution in matrix of the Ni-basesuperalloy GH99 is almost equal to about 0.019.wt-% and an excess is formedas primary carbide.The cracks in the specimen is initiated along the primary car-bide-matrix interfaces perpendicular to the direction of stress applied during thestress rupture testing.A critical size of the primary carbide for crack initiationis found to be 0.80±0.05 μm.The more the carbon contained in the alloy,themore the primary carbide no less the critical size is,and the more severely itsstress rupture life lowers.However,the amount of primary carbide up to thiscritical size may be remarkably reduced by limiting the carbon addition below0.05 wt-%.It was also resulted that the carbide,M_(23)C_6,along the longitudinalgrain boundaries parallel to the stress applied migrate toward the transverse grainboundaries normal to the stress applied,and the M_(23)C_6 along transverse grainboundaries may be coagulated and linked together.Thus,it would weaken the grainboundary strength and injure the stress rupture property of the alloy.The rate ofits coagulation seems to related to the carbon contained in the alloy,the morethe carbon content,the faster the rate is. Received:  18 February 1985      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/Y1985/V21/I2/53 1 Holt,R.T.;Wallace,W.,Int.Met.Rev.,21(1976) ,1． 2 Kihara,S.;Newkirk,J.B.;Ohtomo,A.;Saiga,Y.,Metall.Trans.,11A(1980) ,1019． No related articles found! No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed