IMR OpenIR
Microstructural evolutions and fracture behaviors of a newly developed nickel-base superalloy during creep deformation
Cui, LQ; Yu, JJ; Liu, JL; Sun, XF; Yu, JJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
2018-05-25
发表期刊JOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
卷号746页码:335-349
摘要The creep behaviors of the newly designed nickel-base superalloy M951G have been studied over a stress range of 120-760 MPa and a temperature range of 700 degrees C-1000 degrees C, and the corresponding relationship among testing conditions-microstructural evolutions and fracture characteristics-creep properties has been established. Results show that both the microstructural evolutions and fracture characteristics are dependent on testing temperatures and applied stresses. According to X-ray diffraction (XRD) examinations, creep deformations at 700-800 degrees C and high temperatures low stresses have not any distinctive effect on the acquired patterns. However, deformations at high temperatures relatively higher stresses have significantly highlighted the (220)(gamma &') planes, which may enhance the creep strength and lead to a better plasticity for M951G alloy. Furthermore, precipitate dimensional changes and their effects on creep properties also have been widely discussed. At the same testing temperature, creep life of M951G alloy decreases with applied stress increasing, which has been analyzed in detail. Fracture behaviors of M951G alloy are observed by using optical microscope (OM) and scanning electron microscope (SEM), which change from a mixed type of transgranular and intergranular to pure intergranular cracking with the variation of creep conditions. The values of apparent stress exponents at 700 degrees C and 1000 degrees C are calculated to be about 11.5 and 6.4 respectively, the difference of which is due to the changes of the deformation mechanisms, fracture modes and the degeneration of microstructures. (c) 2018 Published by Elsevier B.V.; The creep behaviors of the newly designed nickel-base superalloy M951G have been studied over a stress range of 120-760 MPa and a temperature range of 700 degrees C-1000 degrees C, and the corresponding relationship among testing conditions-microstructural evolutions and fracture characteristics-creep properties has been established. Results show that both the microstructural evolutions and fracture characteristics are dependent on testing temperatures and applied stresses. According to X-ray diffraction (XRD) examinations, creep deformations at 700-800 degrees C and high temperatures low stresses have not any distinctive effect on the acquired patterns. However, deformations at high temperatures relatively higher stresses have significantly highlighted the (220)(gamma &') planes, which may enhance the creep strength and lead to a better plasticity for M951G alloy. Furthermore, precipitate dimensional changes and their effects on creep properties also have been widely discussed. At the same testing temperature, creep life of M951G alloy decreases with applied stress increasing, which has been analyzed in detail. Fracture behaviors of M951G alloy are observed by using optical microscope (OM) and scanning electron microscope (SEM), which change from a mixed type of transgranular and intergranular to pure intergranular cracking with the variation of creep conditions. The values of apparent stress exponents at 700 degrees C and 1000 degrees C are calculated to be about 11.5 and 6.4 respectively, the difference of which is due to the changes of the deformation mechanisms, fracture modes and the degeneration of microstructures. (c) 2018 Published by Elsevier B.V.
部门归属[cui, luqing ; yu, jinjiang ; liu, jinlai ; sun, xiaofeng] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china ; [cui, luqing] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china
关键词Single-crystal Superalloy Manganese-silicon Alloy High-temperature Mechanical-properties Stacking-fault Low-stress Fatigue Damage M951g Phase
学科领域Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者National Natural Science Foundation of China [50931004, 51571196, 51771191]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79300
专题中国科学院金属研究所
通讯作者Yu, JJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式
GB/T 7714
Cui, LQ,Yu, JJ,Liu, JL,et al. Microstructural evolutions and fracture behaviors of a newly developed nickel-base superalloy during creep deformation[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,746:335-349.
APA Cui, LQ,Yu, JJ,Liu, JL,Sun, XF,&Yu, JJ .(2018).Microstructural evolutions and fracture behaviors of a newly developed nickel-base superalloy during creep deformation.JOURNAL OF ALLOYS AND COMPOUNDS,746,335-349.
MLA Cui, LQ,et al."Microstructural evolutions and fracture behaviors of a newly developed nickel-base superalloy during creep deformation".JOURNAL OF ALLOYS AND COMPOUNDS 746(2018):335-349.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Cui, LQ]的文章
[Yu, JJ]的文章
[Liu, JL]的文章
百度学术
百度学术中相似的文章
[Cui, LQ]的文章
[Yu, JJ]的文章
[Liu, JL]的文章
必应学术
必应学术中相似的文章
[Cui, LQ]的文章
[Yu, JJ]的文章
[Liu, JL]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。