Martensite Midrib in an Fe-1C-17Cr Stainless Steel

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.172-174.67 ◽

2011 ◽

Vol 172-174 ◽

pp. 67-72 ◽

Cited By ~ 2

Author(s):

Jer Ren Yang ◽

Hsin Yi Lee ◽

Hung Wei Yen ◽

Hsiao Tzu Chang

Keyword(s):

Stainless Steel ◽

Thin Plate ◽

Deformation Mode ◽

Plate Martensite ◽

Subsequent Growth ◽

Preferential Position

An Fe-1.0C-17Cr (wt.%) stainless steel was subjected to subzero treatment to investigated the structure of martensite midrib. The midrib region appeared in the thin plate and lenticular martensites have been observed detailed by TEM. The TEM result reveals that the transformations of thin plate martensite and lenticular martensite are initiated at the same midrib region. The former keeps the lattice-invariant deformation mode of twinning during subsequent growth, whereas the latter combines both twinning and slip modes. Midrib region is a preferential position for carbide precipitations after tempering. M3C and M23C6carbide were found in this alloy, and related to the ferrite by Bagaryatsky OR and K-S OR, respectively.

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Effects of Deformation Mode on Resistivity Curve Used for Estimating Martensite Induced in Stainless Steel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.638-642.2992 ◽

2010 ◽

Vol 638-642 ◽

pp. 2992-2997 ◽

Cited By ~ 3

Author(s):

Hidefumi Date

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Linear Relation ◽

Volume Fraction ◽

Tensile Deformation ◽

Deformation Mode ◽

Transformation Process ◽

Martensite Formation ◽

Austenitic Phase ◽

Ε Phase

The martensite induced in three types of austenitic stainless steel, which indicate the different stability of the austenitic phase (γ), were estimated by the resistivity measured during the tensile deformation or compressive deformation at the temperatures 77, 187 and 293 K. The resistivity curves were strongly dependent on the deformation mode. The volume fraction of the martensite (α’) was also affected by the deformation mode. The ε phase, which is the precursor of the martensite and is induced from the commencement of the deformation, decreased the resistivity. However, lots of defects generated by the deformation-induced martensite increased the resistivity. The experimental facts and the results shown by the modified parallelepiped model suggested a complicated transformation process depending on each deformation mode. The results shown by the model also suggested a linear relation between the resistivity and the martensite volume at the region of the martensite formation. The fact denoted that the resistivity is mostly not controlled by the austenite, ε phase and martensite, but by the defects induced due to the deformation-induced martensite.

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A Study on the Strength under Pressure of Micro Heat Exchanger

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.326-328.265 ◽

2006 ◽

Vol 326-328 ◽

pp. 265-268

Author(s):

Taek Joon Son ◽

Young Shin Lee

Keyword(s):

Stainless Steel ◽

Fluid Flow ◽

Heat Exchanger ◽

Structural Analysis ◽

Thin Plate ◽

Thin Plates ◽

Micro Channel ◽

Design Guideline ◽

Micro Heat Exchanger ◽

Micro Channels

The strength of micro heat exchanger under pressure is studied in this paper. Micro heat exchanger is made with brazing technology. It is constructed of stainless steel thin plates with micro channels and in/out port for fluid flow. Micro channels in thin plates are formed by etching and all parts including thin plates are joined by brazing. The study on the strength under pressure is performed by structural analysis. For structural analysis, one layer of micro heat exchanger body is considered. It is composed of thin plate with micro channel and brazing filler which is used to join thin plates. This paper shows the tendency of stress behavior and gives design guideline of micro heat exchanger.

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Effect of stamping load variation on deformation behaviour of stainless steel thin plate with microchannel

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1177/0954405412462673 ◽

2013 ◽

Vol 227 (8) ◽

pp. 1121-1128 ◽

Cited By ~ 12

Author(s):

Ja-Yoon Koo ◽

Yong-Phil Jeon ◽

Chung-Gil Kang

Keyword(s):

Stainless Steel ◽

Thin Plate ◽

Deformation Behaviour ◽

Load Variation

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Slurry Erosion Behaviors of Pseudoelastic TiNi Alloy

ASME/STLE 2007 International Joint Tribology Conference, Parts A and B ◽

10.1115/ijtc2007-44169 ◽

2007 ◽

Author(s):

Renbo Xu ◽

Lishan Cui ◽

Yanjun Zheng ◽

Siwei Zhang

Keyword(s):

Stainless Steel ◽

Erosion Resistance ◽

Deformation Mode ◽

Experimental Results ◽

Material Surface ◽

Tini Alloy ◽

Erosion Process ◽

Slurry Erosion ◽

Pile Up ◽

The Impact

The slurry erosion behaviors of pseudoelastic TiNi alloy were studied using the liquid/solid impingement system and compared with SUS 630 and 2Cr12NiMo1W1V alloy. The influences of erosion time and angle on erosion resistance of three materials were surveyed. The experimental results show that TiNi alloy has the highest erosion resistance among the three materials and SUS 630 stainless steel is more resistant than 2Cr12NiMoW1V alloy. The KQL-300 indentation tester was used to simulate the impact of particle on material surface during erosion process. The results show that the deformation mode of indention can be pile-up or sink-in and there is a good correlation between erosion resistance of material and its indentation deformation mode. The sink-in deformation mode indicates the higher resistance to erosion, and the pile-up deformation mode implies the lower erosion resistance.

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