displacement n. 1.轉(zhuǎn)位,移動(dòng);取代,置換;(人的)流離失所。 2.撤換,免職。 3.【機(jī)械工程】(活塞)排氣量;【航?!颗潘俊惨话阒杠娕灥呐潘浚簧檀呐潘恳话阌?gross [net] ton(nage)〕。 4.【化學(xué)】置換(作用),取代(作用);【物理學(xué)】位移;【醫(yī)學(xué)】移位;【生物學(xué)】替位;【藥學(xué)】濾過(guò);【地質(zhì)學(xué);地理學(xué)】(斷層)移動(dòng)。 displacement nitration process 【化學(xué)】取代硝化。
constant adj. 1.恒定不變的,固定的,穩(wěn)定的,恒久的;繼續(xù)不斷的。 2.不屈不撓的,堅(jiān)韌的。 3.忠實(shí)的,有節(jié)操的。 be constant in love 忠貞不渝的愛(ài)情。 two days of constant rain 兩天接連下雨。 constant to one's duty 忠于職守。 constant wind 恒風(fēng)。 n. 【數(shù)、物】常數(shù),恒量;恒定(值);(常)系數(shù),率;【語(yǔ)法】(轉(zhuǎn)換語(yǔ)法用語(yǔ))定項(xiàng)。 the circular constant圓周率。 adv. -ly
It was found that many dislocations were emitted from the crack tip during the early stage of crack propagation and were driven out of the crack tip area , and them piled up inversely . a closed dislocation free zone ( dfz ) was formed between the crack tip and the pile - up dislocations . keeping displacement constant , the dislocations were still emitted from the crack tip for a while 本文首先系統(tǒng)地研究了工業(yè)純金屬( fe , al , ti和mg )斷裂的微觀過(guò)程,發(fā)現(xiàn)所研究的工業(yè)純金屬斷裂過(guò)程裂尖均首先發(fā)射位錯(cuò),并離開(kāi)裂尖向前運(yùn)動(dòng)、在裂尖留下無(wú)位錯(cuò)區(qū),位錯(cuò)反塞積在五位錯(cuò)區(qū)的端部,反塞積位錯(cuò)群一般呈封閉狀包圍無(wú)位錯(cuò)區(qū)。
Keeping displacement constant , the length of dfz decreased . the less the lattice resistance is , the longer the dfz is . during the crack propagation , the pile - up dislocations may move forward in the previous direction or in another direction which caused shape of dfz changed . the dislocations emitted from the crack tip might pile up in the dfz and can be served as dislocation source in the successive loading 在裂紋擴(kuò)展過(guò)程,反塞積位錯(cuò)群發(fā)生變化,可以沿原來(lái)方向繼續(xù)向前運(yùn)動(dòng),也可能改變運(yùn)動(dòng)方向使無(wú)位錯(cuò)區(qū)的形狀發(fā)生變化,后來(lái)發(fā)射出的位錯(cuò)可以在原五位錯(cuò)區(qū)中塞積,并可作為位錯(cuò)源在后續(xù)的加載中發(fā)射位錯(cuò)。