塑性脆性轉變 的英文怎麼說
中文拼音 [sùxìngcuìxìngzhuǎnbiàn]
塑性脆性轉變
英文
plastic brittle transition-
It was found that nitrogen increased the fracture strength of silicon single crystal. we consider that the nitrogen may change the shockley band on silicon surface and form complex to influence the fracture procedure
本文從硅材料的基本概念入手，闡述了硅單晶材料的脆性斷裂、脆塑轉變以及在熱處理過程中的翹曲研究，並通過這三個部分進行實驗。After pretorsion the successor tensile yield limit and strength limit both improved very highly, but the trend of the increase of the strength limit was suspended till the pretorsional capacity reached 17, when the pretorsional capacity was greater than17 ( prestrain value was 81. 19 % of total strain ), the successor strength limit rapid failed and approached the yield limit. this illustrate the a3 steel specimen translate from plasticity into friability after pretorsion strengthen. when the specimen was operated by tension - torsion action, the yield limit had very large improved, but the strength limit changed very little. furthermore, the trend of the increase of the strength limit was suspended till the pretension capacity reached 0. 25 ( prestrain value was 66. 93 % of total strain )
A3鋼試件在預扭轉后，后繼拉伸屈服極限和強度極限均有很大提高，但強度極限的增大趨勢到預扭轉量為17為止，預扭轉量大於17 （預應變值為總應變的81 . 19 ）后強度極限迅速下降，與其屈服極限接近，這說明a3鋼試件經預扭轉強化后逐漸由塑性轉化為脆性。該預應變值為a3鋼試件的韌脆轉變點。 a3鋼試件在拉伸-扭轉作用下，屈服極限有很大提高，但強度極限沒有多大改變，而且，屈服極限的增大趨勢到預拉伸量為0 . 25應變（預應變量為總應變量的66 . 93 ）后就不再增加。In this paper, molecular dynamics simulation is carried on the nanometric cutting of defect - free monocrystalline silicon. based on simulations, a reasonable explanation is given to the forming mechanism of chip and surface machined in the cutting process of monocrystalline silicon. moreover, the feasibility of brittle - ductile transition of monocrystalline silion is studied with the method of first principle stress
對內部無缺陷的單晶硅的納米切削過程進行了分子動力學模擬.通過模擬結果，對單晶硅納米切削中的切屑形成過程和加工表面的形成過程做出了合理的解釋.並用第一原理應力計算方法對單晶硅納米切削過程中的脆塑轉變的可行性進行了研究Moreover, the detailed calculation and contrastive analysis are carried out by using the software ansys. theoretical calculation and testing results show that adopting the connection construction with a hole on the web can alleviate the stress state greatly and transform the failure mode of the connection from brittle fracture to local buckling damage on beam, reduces the possibility of brittle fracture by welding and improve the ductility performance of connection to a great extent
結果表明，採用腹板開孔的節點形式，可以使梁的塑性鉸位置由梁根部向中部偏移，達到了有效控制塑性鉸位置的目的;同時，採用這種節點構造可以改變節點附近的梁截面應力分佈狀態，降低了節點脆性破壞的可能性，使節點的破壞模式從脆性破壞轉變為梁的局部屈曲破壞，很大程度上改善了結構的延性。分享友人