【摘要】：裂紋尖端張開(kāi)位移(CTOD)是彈塑性斷裂力學(xué)中重要參數(shù),其大小直接反映了材料裂紋尖端抗開(kāi)裂的能力,作為大厚度鋼板低溫?cái)嗔秧g性的主要評(píng)定標(biāo)準(zhǔn)之一,應(yīng)用廣泛。本文在深入研究各規(guī)范對(duì)CTOD實(shí)驗(yàn)試樣取樣方向的規(guī)定后,依據(jù)規(guī)范BS7448:Part1:1991和API RP 2Z對(duì)某鋼廠100mm厚API 2W Gr 60鋼母材及熱處理后母材進(jìn)行-10℃、兩種取樣方式下的CTOD實(shí)驗(yàn)。結(jié)果表明所有試樣實(shí)驗(yàn)結(jié)果均滿(mǎn)足規(guī)范驗(yàn)收標(biāo)準(zhǔn),但熱處理降低了材料的韌性。對(duì)比不同取樣方向下的實(shí)驗(yàn)結(jié)果,發(fā)現(xiàn)厚鋼板母材中裂紋尖端在厚度方向上的抗開(kāi)裂能力小于其在晶粒流動(dòng)方向上的抗開(kāi)裂能力,而在熱處理后母材中表現(xiàn)正好相反,為CTOD實(shí)驗(yàn)中合理選取試樣取樣方向提供參考。
[Abstract]:Crack tip opening displacement (CTOD) is an important parameter in elastic-plastic fracture mechanics, and its size directly reflects the crack resistance ability of material crack tip. As one of the main evaluation criteria of low-temperature fracture toughness of large-thickness steel plate, it is widely used. In this paper, after deeply studying the sampling direction of CTOD samples in various codes, CTOD experiments were carried out on the base metal of 100mm thick API 2W Gr 60 steel and the base metal after heat treatment at -10 鈩，

本文編號(hào)：2416385