On the Nitrogen-Induced Lattice Expansion of a Non-stainless Austenitic Steel, Invar 36®, Under Triode Plasma Nitriding

被引：22
作者：
Tao, Xiao [1 ,2 ]
Matthews, Allan [3 ]
Leyland, Adrian [1 ]
机构：
[1] Univ Sheffield, Dept Mat Sci & Engn, Sir Robert Hadfield Bldg,Mappin St, Sheffield S1 3JD, S Yorkshire, England
[2] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England
[3] Univ Manchester, Sch Mat, Manchester M13 9PL, Lancs, England
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2020年 / 51卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
X-RAY-DIFFRACTION; EXPANDED AUSTENITE; LOW-ENERGY; HIGH-FLUX; S-PHASE; FE-CR; CRYSTALLOGRAPHIC STRUCTURE; CARBON SUPERSATURATION; TEMPERATURE; NI;
D O I：
10.1007/s11661-019-05526-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Chromium, as a strong nitride-forming element, is widely regarded to be an "essential" ingredient for the formation of a nitrogen-expanded lattice in thermochemical nitrogen diffusion treatments of austenitic (stainless) steels. In this article, a proprietary "chrome-free" austenitic iron-nickel alloy, Invar (R) 36 (Fe-36Ni, in wt pct), is characterized after triode plasma nitriding (TPN) treatments at 400 degrees C to 450 degrees C and compared with a "stainless" austenitic counterpart RA 330 (R) (Fe-19Cr-35Ni, in wt pct) treated under equivalent nitriding conditions. Cr does indeed appear to play a pivotal role in colossal nitrogen supersaturation (and hence anisotropic lattice expansion and superior surface hardening) of austenitic steel under low-temperature (<= 450 degrees C) nitrogen diffusion. Nevertheless, this work reveals that nitrogen-induced lattice expansion occurs below the nitride-containing surface layer in Invar 36 alloy after TPN treatment, implying that Cr is not a necessity for the nitrogen-interstitial induced lattice expansion phenomenon to occur, also suggesting another type of gamma(N).
引用
收藏
页码：436 / 447
页数：12
相关论文
共 54 条
[1]  
ATKINSON D, 1970, J IRON STEEL I, V208, P587
[2]   On the elusive crystal structure of expanded austenite [J].
Brink, Bastian K. ;
Stahl, Kenny ;
Christiansen, Thomas L. ;
Oddershede, Jette ;
Winther, Grethe ;
Somers, Marcel A. J. .
SCRIPTA MATERIALIA, 2017, 131 :59-62
[3]   Composition-dependent variation of magnetic properties and interstitial ordering in homogeneous expanded austenite [J].
Brink, Bastian K. ;
Stahl, Kenny ;
Christiansen, Thomas L. ;
Frandsen, Cathrine ;
Hansen, Mikkel F. ;
Somers, Marcel A. J. .
ACTA MATERIALIA, 2016, 106 :32-39
[4]   Formation and microstructural characterisation of S-phase layers in Ni-free austenitic stainless steels by low-temperature plasma surface alloying [J].
Buhagiar, Joseph ;
Li, Xiaoying ;
Dong, Hanshan .
SURFACE & COATINGS TECHNOLOGY, 2009, 204 (03) :330-335
[5]   Colossal carbon supersaturation in austenitic stainless steels carburized at low temperature [J].
Cao, Y ;
Ernst, F ;
Michal, GM .
ACTA MATERIALIA, 2003, 51 (14) :4171-4181
[6]   Co-existence of γ′N phase and γN phase on nitrided austenitic Fe-Cr-Ni alloys- I. experiment [J].
Che, H. L. ;
Tong, S. ;
Wang, K. S. ;
Lei, M. K. ;
Somers, Marcel A. J. .
ACTA MATERIALIA, 2019, 177 :35-45
[7]   Low temperature gaseous nitriding and carburising of stainless steel [J].
Christiansen, T ;
Somers, MAJ .
SURFACE ENGINEERING, 2005, 21 (5-6) :445-455
[8]  
Christiansen T, 2006, Z METALLKD, V97, P79
[9]   Controlled dissolution of colossal quantities of nitrogen in stainless steel [J].
Christiansen, T ;
Somers, MAJ .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2006, 37A (03) :675-682
[10]   On the crystallographic structure of S-phase [J].
Christiansen, T ;
Somers, MAJ .
SCRIPTA MATERIALIA, 2004, 50 (01) :35-37
123456