Stress exponent and threshold stress of in situ TiCp/LD7Al matrix composite in creep

Ji Feng; Song Ai-Jun; Zhang Wei-Guo; Hao Qiu-Hong; Bai Bang-Wei; Liu Ri-Ping; Ma Ming-Zhen

doi:10.7498/aps.59.2114

Abstract

The elevated temperature creep behavior of in situ 20vol%TiCP/LD7Al matrix composite and LD7Al alloy was investigated under the condition of constant compressive stress at 523 K，573 K and 623 K，respectively. The stress exponents of the composite material and the matrix aluminium alloy were obtained by fitting the creep rate and the applied stress in log-log plot，respectively. By introducing an effective stress （σ-σ0） to the power equation and extroplating the linearly-regressed experemental data to zero creep rate，the threshold stresses were obtained. The results showed that both the stress exponents and the threshold stresses of the composite were higher than those of LD7Al，indicating that the presence of TiC particles significantly improved the elevated temperature creep property of LD7Al. By introducing a threshold stress，the high-temperature creep behavior of the composite can be explained by the cooperative effect of the dislocation-climbing and the particle hindrance to the matrix deformation.

Keywords:

Authors and contacts

(1)亚稳材料制备技术与科学国家重点实验室，燕山大学，秦皇岛 066004; (2)亚稳材料制备技术与科学国家重点实验室，燕山大学，秦皇岛 066004；河北科技师范学院，秦皇岛 066004; (3)亚稳材料制备技术与科学国家重点实验室，燕山大学，秦皇岛 066004；巨龙钢管有限公司，清县 062658

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[5]	［5］Li Y，Langdon T G 1998 Acta Mater. 46 1143
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[22]	］Mohamed F A，Langdon T G 1974 Acta Metall. 22 779
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[24]	］Ricardo F，Gaspar G D 2008 Acta Mater. 56 2549
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[26]	］Anastasia H. Muliana，Jeong Sik Kim 2007 Int. J. Solids Struct. 44 6891
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[34]	］Wu Z Y，Yang Y T，Chai C C，Li Y J，Wang J Y，Liu J 2009 Acta Phys. Sin. 58 2625 （in Chinese）［吴振宇、杨银堂、柴常春、李跃进、汪家友、刘静 2009 物理学报 58 2625］

Cited By

[1]	［1］Xiao B L，Ma Z Y，Bi J 2002 Acta Metall. Sin. 38 994 （in Chinese）［肖伯律、马宗义、毕敬 2002 金属学报 38 994］
[2]	［2］Huang M H，Wang H W，Li X F，Ma N H 2005 Acta Mater Compos. Sin. 22 36 （in Chinese）［黄明华、王浩伟、李险峰、马乃恒 2005 复合材料学报 22 36］
[3]	［3］Ma Z Y，Tjong S C 1999 Mater. Sci. Eng. A 278 5
[4]	［4］Li Y，Langdon T G 1997 Scripta Mater. 36 1457
[5]	［5］Li Y，Langdon T G 1998 Acta Mater. 46 1143
[6]	［6］Pandey A B，Mishra R S，Mahajan Y R 1992 Acta Metall Mater. 40 2045
[7]	［7］Park K T，Mohamed F A 1995 Metall. Meter. Trans. A 26 3119
[8]	［8］Xu F M，Wu Lawrence C M，Han G W，Tan Y 2007 Chin. J. Aeronaut. 20 115
[9]	［9］ACˇUadek J，Pahutov M，1ustek V 2000 Mater. Sci. Eng. A 281 162
[10]	］ACˇUadek J，Kucha Arˇo v＇K，Zhu S J 1998 Mater. Sci. Eng. A 246 252
[11]	］Deshmukh S P，Mishra R S，Kendig K L 2005 Mater. Sci. Eng. A 410-411 53
[12]	］Ji F，Ma M Z，Song A.J，Zhang W G，Zong H T，Liang S X，Osamu Y，Liu R P 2009 Mater. Sci. Eng. A 506 58
[13]	］Zhang W G，Song A J，Liu R P，Ma M Z 2008 Mater. Sci. Eng. A 474 225
[14]	］Ricardo F，Gaspar G D 2009 J. Alloys Compd. 478 133
[15]	］Ricardo F，Gaspar G D 2008 Scripta Mater. 59 1135
[16]	］Olbricht J，Yawny A，Young M L，Eggeler G 2009 Mater. Sci. Eng. A 510-511 407
[17]	］Zong B Y，Derby B 1997 Acta Mater. 45 41
[18]	］ACˇUadek J，Oikawa H，ustek V 1995 Mater. Sci. Eng. A 190 9
[19]	］Mohamed F A 1998 Mater. Sci. Eng. A 245 242
[20]	］Zhu S M，Tjong S C，Lai J K L 1998 Acta Mater. 46 2969
[21]	］Shi N，Wilner B，Arsenault R J 1992 Acta Metall. Mater. 40 2841
[22]	］Mohamed F A，Langdon T G 1974 Acta Metall. 22 779
[23]	］Sherby O D，Klundt R H，Miller A K 1977 Metall. Trans A 8 843
[24]	］Ricardo F，Gaspar G D 2008 Acta Mater. 56 2549
[25]	］Ricardo F，Gaspar G D 2009 J. Alloys Compd. 475 202
[26]	］Anastasia H. Muliana，Jeong Sik Kim 2007 Int. J. Solids Struct. 44 6891
[27]	］Peng J，Long Z L，Wei H Q，Li X A，Zhang Z C 2009 Acta Phys. Sin. 58 4059 （in Chinese）［彭建、龙志林、危洪清、李乡安、张志纯 2009 物理学报 58 4059］
[28]	］Nieh T G 1984 Metall. Trans. A 15 139
[29]	］Krajewski P E，Allison J E，Jones J W 1993 Metall. Trans. A 24 2731
[30]	］Krajewski P E，Jones J W，Allison J E 1995 Metall. Mater. Trans. A 26 3107
[31]	］Jin H M，Felix A，Aroyave M 2006 Acta Phys. Sin. 55 6157 （in Chinese）［靳惠明、Felix A、Aroyave M 2006 物理学报 55 6157
[32]	］Dlouhy A，Merk N，Eggeler G 1993 Acta Metall. Mater. 41 3245［33］Dlouhy A，Eggeler G，Merk N 1995 Acta Metall. Mater. 43 535
[33]	］Nikhilesh C，Krishan K C 2006 Metal Matrix Composites （Springer，Printed in the United States of America） p320
[34]	］Wu Z Y，Yang Y T，Chai C C，Li Y J，Wang J Y，Liu J 2009 Acta Phys. Sin. 58 2625 （in Chinese）［吴振宇、杨银堂、柴常春、李跃进、汪家友、刘静 2009 物理学报 58 2625］

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Vol. 59, Issue 3 - 2010-02-05

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