Properties and influence of microstructure and crystal defects in Fe2VAl modified by laser surface remelting

被引：23

作者：

Gomell, Leonie ^{[1
]}

Roscher, Moritz ^{[1
]}

Bishara, Hanna ^{[1
]}

Jaegle, Eric A. ^{[1
,2
]}

Scheu, Christina ^{[1
]}

Gault, Baptiste ^{[1
,3
]}

机构：

[1] Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany

[2] Univ Bundeswehr Munchen, Inst Werkstoffkunde, Werner Heisenberg Weg 39, D-85577 Neubiberg, Germany

[3] Imperial Coll London, Royal Sch Mines, Dept Mat, London, England

来源：

SCRIPTA MATERIALIA | 2021年 / 193卷

基金：

欧洲研究理事会;

关键词：

Thermoelectric materials; Atom probe tomography; Microstructure; Grain boundary defects; Laser surface remelting; THERMOELECTRIC PROPERTIES; BISMUTH TELLURIDE; ANTISITE DEFECTS; HOT-CRACKING; PERFORMANCE; BOUNDARIES;

D O I：

10.1016/j.scriptamat.2020.10.050

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Laser surface remelting can be used to manipulate the microstructure of cast materials. Here, we present a detailed analysis of Fe2VAl following laser surface remelting. Within the melt pool, elongated grains grow nearly epitaxially from the heat-affected zone. These grains are separated by low-angle grain bound-aries with 1 degrees-5 degrees misorientations. Segregation of vanadium, carbon, and nitrogen at grain boundaries and dislocations is observed using atom probe tomography. The local electrical resistivity was measured by an in-situ four-point-probe technique. A smaller increase in electrical resistivity is observed at these low angle grain boundaries compared to high-angle grain boundaries in a cast sample. This indicates that grain boundary engineering could potentially be used to manipulate thermoelectric properties. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：153 / 157

页数：5

共 34 条

[11] Chemical segregation and precipitation at anti-phase boundaries in thermoelectric Heusler-Fe2VA1 [J].

Gomell, Leonie ;

Katnagallu, Shyam ;

Diack-Rasselio, Abou ;

Maier, Stefan ;

Perriere, Loic ;

Scheu, Christina ;

Alleno, Eric ;

Gault, Baptiste .

SCRIPTA MATERIALIA, 2020, 186 :370-374

[12] Dense dislocation arrays embedded in grain boundaries for high-performance bulk thermoelectrics [J].

Kim, Sang Il ;

Lee, Kyu Hyoung ;

Mun, Hyeon A. ;

Kim, Hyun Sik ;

Hwang, Sung Woo ;

Roh, Jong Wook ;

Yang, Dae Jin ;

Shin, Weon Ho ;

Li, Xiang Shu ;

Lee, Young Hee ;

Snyder, G. Jeffrey ;

Kim, Sung Wng .

SCIENCE, 2015, 348 (6230) :109-114

[13] Atomic-scale grain boundary engineering to overcome hot-cracking in additively-manufactured superalloys [J].

Kontis, Paraskevas ;

Chauvet, Edouard ;

Peng, Zirong ;

He, Junyang ;

da Silva, Alisson Kwiatkowski ;

Raabe, Dierk ;

Tassin, Catherine ;

Blandin, Jean-Jacques ;

Abed, Stephane ;

Dendievel, Remy ;

Gault, Baptiste ;

Martin, Guilhem .

ACTA MATERIALIA, 2019, 177 :209-221

[14] RAPID SOLIDIFICATION PROCESSING AND MICROSTRUCTURE FORMATION [J].

KURZ, W ;

TRIVEDI, R .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1994, 179 (pt 1) :46-51

[15] Order-disorder transitions in the Fe2VAl Heusler alloy [J].

Maier, S. ;

Denis, S. ;

Adam, S. ;

Crivello, J. -C. ;

Joubert, J. -M. ;

Alleno, E. .

ACTA MATERIALIA, 2016, 121 :126-136

[16] The 100th anniversary of the four-point probe technique: the role of probe geometries in isotropic and anisotropic systems [J].

Miccoli, I. ;

Edler, F. ;

Pfnuer, H. ;

Tegenkamp, C. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2015, 27 (22)

[17] Effect of Off-Stoichiometry on the Thermoelectric Properties of Heusler-Type Fe2VAl Sintered Alloys [J].

Mikami, M. ;

Inukai, M. ;

Miyazaki, H. ;

Nishino, Y. .

JOURNAL OF ELECTRONIC MATERIALS, 2016, 45 (03) :1284-1289

[18]

Mikami M., 2012, J APPL PHYS, P111

[19] The role of side-branching in microstructure development in laser powder-bed fusion [J].

Minh-Son Pham ;

Dovgyy, Bogdan ;

Hooper, Paul A. ;

Gourlay, Christopher M. ;

Piglione, Alessandro .

NATURE COMMUNICATIONS, 2020, 11 (01)

[20] Electronic structure and thermoelectric properties of bismuth telluride and bismuth selenide [J].

Mishra, SK ;

Satpathy, S ;

Jepsen, O .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1997, 9 (02) :461-470

← 1 2 3 4 →