%0 Journal Article
%T HIGH-TEMPERATURE TENSILE FRACTURE BEHAVIOR OF DIRECTIONALLY SOLIDIFIED Ni, Cr, Al-TaC EUTECTIC SUPERALLOY
%A JZhang
%A JJYu
%A HZFu
%A <br>J.Zhang
%A J.J.Yu
%A H.Z.Fu
%J 金属学报(英文版)
%D 2004
%I 
%X The high-temperature tensile fracture behavior of the Ni, Cr, Al-TaC eutectic superalloy directionally solidified under high temperature gradient is investigated. The hightemperature tensile fracture of this in situ composite has ductile character with lots of ductile nests whose diameters decrease with the increasing solidification rates. The maximum σb and δ are respectively 668.5MPa and 19.6%. There is a TaC whisker in the center of each nest, and the deformation of γ' and TaC is uneven. The hightemperature tensile behavior cannot be explained by the rule of mixtures but is decided by the formation of the plastic deforrmation band. The crack extension model is given.
%K Ni
%K Cr
%K Al-TaC eutectic superalloy
%K directional solidification
%K in situ composite
%K high-temperature tenslie fracture<br>抗拉强度
%K 超耐热合金
%K 镍合金
%K 高温合金
%K 断裂韧度
%K Ni-Cr-Al-TaC
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=B758988CC27E6E2A19D6572500DB82E2&yid=D0E58B75BFD8E51C&vid=BCA2697F357F2001&iid=E158A972A605785F&sid=366B1248A15658C5&eid=3389C664025A98F9&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=7