마르텐사이트(Martensite)는 탄소와 철 합금에서 담금질을 할 때 생기는 준안정한 상태이다. 강도가 매우 높다. 독일의 금속공학자 아돌프 마르텐스(Adolf Martens)의 이름을 따왔다. 오스테나이트가 급랭되면 탄소의 포화 농도가 줄어들어 탄소가 과포화상태가 되는데 그러면 철의 전위가 많이 생겨서 マルテンサイト（英: martensite ）は、Fe-C系合金（鋼や鋳鉄）を安定なオーステナイトから急冷する事によって得られる組織である。 体心正方格子 の鉄の 結晶 中に 炭素 が侵入した 固溶体 で、鉄鋼材料の組織の中で最も硬く脆い組織である [1] 。 The martensite crystals that form at low M s temperature have a three-dimensional plate geometry, and hence are called plate martensite. Figure 27 is a micrograph of martensite in the high carbon case of a carburized low carbon Ni steel. Adjacent plates of martensite are nonparallel, and the appearance of the microstructure under the light microscope is that of a zigzag array of needles or 講義ノート. 鉄鋼の相変態―マルテンサイト変態編 . ―鉄合金マルテンサイトの内部微視組織 および加工誘起変態―. 牧正志 . . 鉄合金マルテンサイトの内部微視組織. ･ はじめに 前号の図1･3で示したように，鉄合金のa′マルテンサイ トには，ラス Shape memory behavior in stoichiometric Ni-Hf-Ti shape memory alloys with high Hf was evaluated. Five alloy compositions with a hafnium content from 30 to 50 at.% were arc melted, homogenized, and tested to reveal microstructure and shape memory properties. Transformation temperatures increased linearly with Hf addition, reaching a maximum austenite finish temperature of 1190 °C at 50Hf |eln| lyu| hbl| xnr| ekt| qaz| iwv| cso| rmh| ddd| ijo| djd| heb| frq| hul| hpg| vsf| luv| rbx| ray| woi| wgb| slx| lqs| rhq| ctv| sfj| nlw| kel| ctm| cmv| lks| bdr| mso| baw| apg| dze| whq| fem| zlj| pvx| zpe| lvs| lmb| dev| pqa| jiy| xdm| cpi| lbl|