Local formation of Ni4Ti3 in non-equilibrium state and its influence on the transformation temperature of Ti-rich NiTi alloys

被引：20

作者：

Li, Dongyang ^{[1
]}

He, Hao ^{[2
,3
]}

Lou, Jia ^{[5
]}

He, Hao ^{[2
,3
]}

He, Zheyu ^{[1
]}

Luo, Fenghua ^{[1
]}

Li, Yimin ^{[1
,2
]}

Shu, Chang ^{[3
,4
]}

机构：

[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[2] Guangxi Univ Sci & Technol, Res Ctr Mat Sci & Engn, Liuzhou 545006, Peoples R China

[3] Cent South Univ, XiangYa Hosp 2, Changsha 410083, Peoples R China

[4] Chinese Acad Med Sci & Peking Union Med Coll, Fuwai Hosp, Ctr Vasc Surg, Natl Ctr Cardiovasc Dis,State Key Lab Cardiovasc, Beijing 100037, Peoples R China

[5] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 852卷

基金：

中国博士后科学基金;

关键词：

NiTi; Shape memory alloys; Metal injection molding; Precipitation; Martensitic phase transformation; MULTISTAGE MARTENSITIC-TRANSFORMATION; PHASE-TRANSFORMATIONS; MICROSTRUCTURE; RECOVERY; BEHAVIOR;

D O I：

10.1016/j.jallcom.2020.157065

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Local Ni4Ti3 precipitation in non-equilibrium state was observed in Ti-riched Ni(49.4)Ti(50.6 )alloys, prepared by metal injection molding (MIM) without any solution or aging treatment. Upon investigating the underlying mechanism, the precipitation was found to have been caused by C and O impurities, which led to the formation of a Ni-riched region, which acted as a precursor for the precipitation of Ni4Ti3. The absence of liquid phase during pre-alloyed powder sintering was another reason for this phenomenon. The transformation temperature associated with the non-balanced formation of precipitation was discussed. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：6

共 29 条

[1] The mechanism of multistage martensitic transformations in aged Ni-rich NiTi shape memory alloys [J].

Allafi, JK ;

Ren, X ;

Eggeler, G .

ACTA MATERIALIA, 2002, 50 (04) :793-803

[2]

Bataillard L, 1998, PHILOS MAG A, V78, P327, DOI 10.1080/01418619808241907

[3] Powder metallurgical fabrication processes for NiTi shape memory alloy parts [J].

Bram, M ;

Ahmad-Khanlou, A ;

Heckmann, A ;

Fuchs, B ;

Buchkremer, HP ;

Stöver, D .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 337 (1-2) :254-263

[4] Effect of early stages of precipitation and recovery on the multi-step transformation in deformed and annealed near-equiatomic NiTi alloy [J].

Chrobak, D ;

Stróz, D ;

Morawiec, H .

SCRIPTA MATERIALIA, 2003, 48 (05) :571-576

[5] Investigating the influence of Ti powder purity on phase evolution during NiTi sintering using in-situ neutron diffraction [J].

Cluff, Daniel R. ;

Corbin, Stephen F. ;

Gharghouri, Michael A. .

INTERMETALLICS, 2017, 83 :43-54

[6]

Dehghan-Manshadi A., 2020, POWDER TECHNOLOGY

[7] Multiple-step martensitic transformations in Ni-rich NiTi alloys -: an in-situ transmission electron microscopy investigation [J].

Dlouhy, A ;

Khalil-Allafi, J ;

Eggeler, G .

PHILOSOPHICAL MAGAZINE, 2003, 83 (03) :339-363

[8]

DueriG T., 1999, MATER SCI ENG, V273, P275

[9] Origin of abnormal multi-stage martensitic transformation behavior in aged Ni-rich Ti-Ni shape memory alloys [J].

Fan, GL ;

Chen, W ;

Yang, S ;

Zhu, JH ;

Ren, XB ;

Otsuka, K .

ACTA MATERIALIA, 2004, 52 (14) :4351-4362

[10] Influence of carbon on martensitic phase transformations in NiTi shape memory alloys [J].

Frenzel, J. ;

Zhang, Z. ;

Somsen, Ch. ;

Neuking, K. ;

Eggeler, G. .

ACTA MATERIALIA, 2007, 55 (04) :1331-1341

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