Expanding copper mandrel test evaluation of yielding and strain aging behavior of zircaloy-4 PWR fuel clad tube = 구리 맨그렐 팽창시험법을 이용한 가압경수형 피복관 지르칼로이-4의 항복과 변형시효에 관한 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 395
  • Download : 0
Expanding copper mandrel tests were carried out on Zircaloy-4 tube over a temperature range of 573-873 K at $&εgrave;$ =2.0×10^{-6}s^{-1}$ and 573-723 K at $&εgrave;$=1.4×10^{-5}s^{-1}$. More rigorous measurements and exact analysis of test results were made to improve the accuracy and reliability of the expanding copper mandrel tests. Yield pressures at different strain rates and temperatures were calculated from test measurements of diametral plasti c expansion and used to determine activation parameters such as yield stress, shear modulus corrected shear stress, strain rate sensitivity, activation energy and etc. The shift in yield stress peak from 612 K at $&εgrave;$=2.0×10^{-6}s^{-1}$ to 623 K at $&εgrave;$=1.4×10^{-5}s^{-1}$ can be explained in terms of dynamic strain aging due to oxygen atoms, and lower yield stress peak on 698 K at both strain rates is considered to be due to dynamic strain aging by iron atoms atmosphere locking of mobile dislocations. The test results are in good agreement with other previously published test data. The expanding copper mandrel test is proved to be a reliable and quantitative source of testing method with simple devices for yielding and strain aging behavior study for thin-walled tube materials.
Advisors
Lee, Byong-Whi이병휘
Description
한국과학기술원 : 핵공학과,
Publisher
한국과학기술원
Issue Date
1988
Identifier
66511/325007 / 000861177
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 핵공학과, 1988.2, [ viii, 46 p. ]

URI
http://hdl.handle.net/10203/49179
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=66511&flag=dissertation
Appears in Collection
NE-Theses_Master(석사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0