%0 Journal Article
%T Effect of Phosphorus on Mechanical Properties of Fine-Grained GH4133 Nickel Base Superalloy<br>磷含量对细晶镍基GH4133合金力学性能的影响
%A SUN Wenru
%A GUO Shouren
%A MENG Xiaona
%A LI Na
%A HU Zhuangqi
%A <br>孙文儒
%A 郭守仁
%A 孟晓娜
%A 李娜
%A 胡壮麒
%J 金属学报
%D 2004
%I 
%X Apposite phosphorus content can improve the mechanical properties of the fine-grained GH4133 nickel-base superalloy. The grain size of the alloy was refined to ASTM 8-10 grade by controlling the thermal processing and the heat treatment. The tensile specimens fail by intergranular fracture even when the phosphorus level is as high as 0.140\% (mass fraction). The yield and ultimate strengths of the refined alloy are 200 and 150 MPa higher than that of the alloy with a standard microstructure of ASTM 4-5 grain size, respectively. And the above two strengths of the alloy with 0.140% phosphorus are 100 and 50 MPa higher than those of the alloy with a industrial controlled phosphorus level, say 0.005%. The impact specimens fail by intragranular fracture when the phosphorus level is below 0.023% and the fracture toughness of the alloy is higher than 70 MJ/m2. Some parts of the fracture surface of the impact specimen with 0.140\% phosphorus exhibited intergranular fracture characteristics and the fracture toughness is lowered to about 40 MJ/m2. Phosphorus extends the rupture life of the GH4133 alloy and its optimum addition is around 0.011%. The interaction between phosphorus atmosphere and dislocations is discussed to understand the effect of phosphorus on different type of mechanical properties.
%K phosphorus
%K Ni base superalloy
%K mechanical property<br>磷
%K 镍基高温合金
%K 力学性能
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=E8FF630099375FA6&yid=D0E58B75BFD8E51C&vid=1371F55DA51B6E64&iid=94C357A881DFC066&sid=F18BA6286A889C1C&eid=BE5DBC360CD4FFB9&journal_id=0412-1961&journal_name=金属学报&referenced_num=3&reference_num=18