根据焊接热影响区中不同亚区的热循环特征对低碳贝氏体钢进行了焊接热模拟实验.采用示波器载荷冲击试验机检测焊接热模拟试样的冲击韧性,结合OM,SEM,TEM以及EBSD技术对模拟显微组织的观察,分析了不同亚区的显微组织特征与冲击韧性之间的关系.结果表明,当冷却时间ts/5=30 s时,各亚区的裂纹形核功相差并不太大,其值在40-70 J之间.细晶区(FGHAZ)具有良好的止裂能力,裂纹扩展功高达122 J；而部分相变区(ICHAZ)和粗晶区(CGHAZ)的裂纹扩展功较小,分别为51.8和17 J.随t8/5的延长,各亚区的裂纹形核功和扩展功均下降,其中CGHAZ的裂纹形核功和FGHAZ的裂纹扩展功的下降最为显著.不同冷却速率下,M-A组元尺寸和形态的变化是影响裂纹形核功的重要因素.对于裂纹扩展功来说,高冷却速率下,具有高密度大角晶界的FGHAZ具有良好的抗裂纹迅速扩展的能力,但当冷却速率降低,由于原始奥氏体晶粒长大而使裂纹扩展功下降.ICHAZ有效晶粒尺寸不均匀,并随冷却速率的降低,晶粒尺寸明显增大,裂纹扩展功下降.而在CGHAZ中原始奥氏体晶粒显著粗化,大角晶界密度的下降导致裂纹扩展功降低；随冷却速率的降低,原始奥氏体晶粒内的取向变得更为单一,裂纹扩展功进一步降低.
参考文献
| [1] | Shanmugam S,Ramisetti N K,Misra R D K,Hartmann J,Jansto S G.Mater Sci Eng,2008; A478:26 |
| [2] | Yao L D,Zhao X T,Zhao S X.US Pat,0032062Al,2010 |
| [3] | Shome M,Gupta O P,Mohanty O N.Metall Mater Trans,2004; 35A:985 |
| [4] | Li C,Wang Y,Han T,Han B,Li L.J Mater Sci,2011;46:727 |
| [5] | Chen J H,Kikuta Y,Araki T,Yoneda M,Matsuda Y.Acta Metall,1984; 32:1779 |
| [6] | Li Y,Crowther D N,Green M J W,Mitchell P S,Baker T N.ISIJ Int,2001; 41:46 |
| [7] | Sawai T,Wakoh M,Ueshima Y,Mizoguchi S.ISIJ Int,1992; 32:169 |
| [8] | Kojima A,Kiyose A,Uemori R,Minagawa M,Hoshino M,Nakashima T,Ishida K,Yasui H.Nippon Steel Technol Rep,2004; 90:2 |
| [9] | Bob I.Weld J,1991; 70:56 |
| [10] | Terada Y,Tamehiro H,Morimoto H,Hara T,Tsuru E,Asahi H.Proc OMAE,2003:1 |
| [11] | Rodriguez-Ibabe J M.Mater Sci Forum,1998,284-286:51 |
| [12] | Guo A M,Misra R D K,Liu J B,Chea L,He X L,Jansto S J.Mater Sci Eng,2010; A527:6440 |
| [13] | Lambert P A,Gourgues A F,Besson J,Sturel T,Pinear A.Metall Mater Trans,2004; 35A:1039 |
| [14] | Gallo C,Alvarez J A,Gutierrez-Solana F,Polanco J A.Eur Struct Integr Soc,2002; 30:271 |
| [15] | Cvetkovski S,Adziev T,Adziev G,Sedmak A.Eur Struct Integr Soc,2002; 30:95 |
| [16] | Shi Y W.China Materials Engineering Canon:Materials Welding Engineering Vol.22.Beijing:Chemistry Industral Press,2007:128(史耀武.中国材料工程大典—材料焊接工程.第22卷.北京:化学工业出版社,2007:128) |
| [17] | Diaz-Fuentes M,Iza-Mendia A,Gutierrez I.Metall Mater Trans,2003,23A:2505 |
| [18] | Lee J L,Pan Y T.Mater Sci Eng,1991; A136:109 |
| [19] | Biss V,Cryderman R L.Metall Trans,1971; 2:2267 |
| [20] | Zhong Y,Xiao F R,Zhang J W,Shan Y Y,Wang W,Yang K.Acta Mater,2006; 54:435 |
| [21] | McMahon C J,Cohen M.Acta Metall,1965; 13:591 |
| [22] | Poorhaydari K,Patchett B M,Ivey D G.Mater Sci Eng,2006; A435-436:371 |
| [23] | Bonnevie E,Ferriere G,Ikhlef A,Kaplan D,Orain J M.Mater Sci Eng,2004; A385:352 |
| [24] | Lambert A,Drillet J,Gourgues A F,Sturel T,Pineau A.Sci Technol Weld Join,2000; 5:168 |
| [25] | Zhao M C,Hanamura T,Qiu H,Yang K.Mater Sci Eng,2005; A395:327 |
| [26] | Miao C L,Shang C J,Wang X M,Zhang L F.Acta Metall Sin,2010; 46:541(缪成亮,尚成嘉,王学敏,张龙飞.金属学报,2010; 46:541) |
| [27] | Gourgues A F,Flower H M,Lindley T C.Mater Sci Technol,2000; 16:26 |
| [28] | Li Y,Baker T N.Mater Sci Technol,2010; 26:1029 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%