利用扫描电镜(SEM)和透射电镜(TEM)研究了Inconel 625熔敷金属中δ相的形成机理,并揭示了焊后热处理(PWHT)过程中δ相粗化的内在规律.结果表明,经850℃焊后热处理的Incone1625熔敷金属中大量析出的针条状δ相呈网格状分布在基体γ相中,且其附近出现了贫γ"相区域.δ相的形成是一个类贝氏体转变的固态相变过程,其晶核是在γ"相密排面的层错上通过切变方式形成的.同时,δ相的粗化行为是扩散控制的长大过程.保温时间较短时,实际δ相颗粒的平均尺寸符合LSW理论,随着保温时间的延长,δ相的高密度、不同向析出特征使得其实际尺寸偏离了经典LSW理论的预测值.
参考文献
| [1] | Special Metals Corporation Products.INCONEL(R) alloy 625,www.specialmetals.com/products |
| [2] | Murr L E,Martinez E,Gaytan S M.Metall Mater Trans,2011;42A:3491 |
| [3] | Xu Y L,Ran Q X,Li J,Peng J C,Xiao X S,Cao X L,Jia G Q.Mater Sci Eng,2013; A569:27 |
| [4] | Paul C P,Ganesh P,Mishra S K,Bhargava P,Negi J,Nath A K.Opt Laser Technol,2007; 39:800 |
| [5] | Evans N D,Maziase P J,Shingledecker J P,Yamamoto Y.Mater SciEng,2008; A498:412 |
| [6] | Dupont J N,Lippold J C,Kiser S D.Welding Metallurgy and Weldability of Nickel-base Alloys.New Jersey:John Wiley & Sons,2009:47 |
| [7] | Shankar V,Bhanu Sankara Rao K,Mannan S L.J Nucl Mater,2001; 288:222 |
| [8] | Smith G D,Tillack D J,Patel S J.In:Loria E A ed.,Superalloys 718,625,706 and Various Derivatives,Warrendale PA:The Minerals Metals & Materials Society,2001:35 |
| [9] | Janaki Ram D J,Venugopal Reddy A,Prasad Rao K,Madhusudhan Reddy G.JMaterProc Technol,2005; 167:73 |
| [10] | Shoemaker L E.In:Loria E A ed.,Superalloys 718,625,706 and Various Derivatives,Warrendale PA:The Minerals Metals & Materials Society,2005:409 |
| [11] | Cortial F,Corrieu J M,Vernot-Loier C.Metall Mater Trans,1995;26A:1273 |
| [12] | Mathew M D,Bhanu Sankara Rao K,Mannan S L.Mater Sci Eng,2004; A372:327 |
| [13] | Mathew M D,Parameswaran P,Bhanu Sankara Rao K.Mater Charact,2008; 59:508 |
| [14] | Sundararaman M,Mukhopadhyay P,Banerjee S.Metall Trans,1988; A19:453 |
| [15] | Huang Y,Langdon T G.JMaterSci,2007; 42:421 |
| [16] | Zhang H Y,Zhang S H,Cheng M,Li Z X.Mater Characct,2010;61:49 |
| [17] | Yeh A C,Lu K W,Kuo C M,Bor H Y,Wei C N.Mater Sci Eng,2011; A530:525 |
| [18] | Kuo C M,Yang Y T,Bor H Y,Wei C N,Tai C C.Mater Sci Eng,2009; A510-511:289 |
| [19] | Dong J X,Xie X S,Wang M.Ordnance Mater Sci Eng,1993; 16:51 |
| [20] | Xie X S,Dong J X,Fu S H,Zhang M C.Acta Metall Sin,2010;46:1289(谢锡善,董建新,付书红,张麦仓.金属学报,2010; 46:1289) |
| [21] | Footner P K,Richards B J JMater Sci,1982; 17:2141 |
| [22] | Smokingermain R E,translated by Zhang R J.Modern Physical Metallurgy.Beijing:Metallurgical Industry Press,1980:176(Smokingermain R E著,张人洁译.现代物理冶金学.北京:冶金工业出版社,1980:176) |
| [23] | Cahn J W.Acta Metall,1966; 14:83 |
| [24] | Orian RA.Acta Metall,1964; 12:1399 |
| [25] | Burke M G,Miller M K.Precipitationin Alloy 718.Pennsylvania:TMS,1991:3377 |
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