Combined Effects of Deformation and Undercooling on Isothermal Bainitic Transformation in an Fe-C-Mn-Si Alloy
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چکیده
منابع مشابه
Transformation Reversibility in Fe-Mn-Si Shape Memory Alloy
The change of the surface relief associated with stress-induced epsilon martensite before and after the reverse transformation in an Fe-33%Mn-6%Si alloy (Msz264K) has been investigated. The permanent strain of a 2.7% tensile-strained specimen was 1.1% after the reverse transformation. In this specimen, a large part of surface relief still remained after heating to 623K (above Af). When five tra...
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1 緒 言 工具や軸受,ゲ ージなどの精密部品では残留オーステ ナイ ト(rR)が存在すると硬 さや疲労寿命の低下,切 削性 不良あるいは経年形状変化を招きそれらの性質に有害な 影響をもたらす.そ れゆえ,こ れ らに使用する鋼では rRを 極力減少させ るのが好 ましい.し か しなが ら,rR が低合金構造用鋼に存在する場合には延性やじん性が向 上するとともに低温におけるぜい性破壊の防止に役立つ 場合が多い.そ れゆえ,最 近進んで熱処理によって人 為的にrRの 量や存在形態を調整 し混合組織 として優れ た機械的性質 を得ようとす る研究が しばしば見受 けら れ1)~6)る.こ のようなrRを 積極的に利用 しようとする方法 として,近 年Si-Mn鋼 をベイナイ ト変態させるオース テンパー処理が注 目されている. Si-Mn鋼 をベイナイ ト変態 させた場合多量のrRが ...
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The influence of external stresses on the transformation behaviour has been studied for a polycrystalline Fe-3 IMn-SSi alloy exhibiting the y-+& martensitic transformation. Samples have been loaded at temperatures above the M, temperature, cooled with a constant external load to a temperature below the M, temperature and subsequently heated without load to a temperature above the A, temperature...
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HYDROGEN interaction with amorphous alloys has Ribbons (,25-mm thick) of amorphous Fe80B11Si9 were been studied extensively due to both scientific and technoused for this research. The ribbons were produced by planarlogical interest. In the framework of a more comprehensive flow casting and were kindly supplied by AlliedSignal Inc. investigation of hydrogen interaction with amorphous and (Parsi...
متن کاملFormation Process of Lamella Structures by Deformation in an Fe-Mn-Si-Cr-Ni Shape Memory Alloy
For Fe-Mn-Si-Cr-Ni shape memory alloys, it was previously found by HREM study that the formation of the nanometric lamella structures consisting of f.c.c. and h.c.p. phase is very important to exhibit good shape memory effect. In the present work, the formation process of such lamella structures has been studied in detail. The results are as follows. The transformation is initiated by random fo...
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ژورنال
عنوان ژورنال: Metals
سال: 2019
ISSN: 2075-4701
DOI: 10.3390/met9020138