Aging effects in a Cu-12Al-5Ni-2Mn-1Ti shape memory alloy

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	Aging effects in a Cu-12Al-5Ni-2Mn-1Ti shape memory alloy
	Z. G. Wei; H. Y. Peng; W. H. Zou; D. Z. Yang
	1997
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	28 期号:4 页码:955-967
摘要	The isothermal aging effects in an as-quenched Cu-11.88Al-5.06Ni-1.65Mn-0.96Ti (wt pct) shape memory alloy at temperatures in the range 250 degrees C to 400 degrees C were investigated. The changes in the state of atomic order and microstructural evolutions were traced by means of in situ X-ray diffraction and electrical resistivity measurements, as well as transmission electron microscopy (TEM) and optical observations. The kinetics of the aging process, i.e., the temperature and time dependence of the properties including hardness, resistivity, martensitic transformation temperatures, and shape memory capacity were characterized, and at least three temperature-dependent aging stages were distinguished: (1) DO3 or L2(1) atomic reordering, which causes the martensitic transformation temperatures to shift upward and leads the M18R martensite to tend to be a N18R type structure; (2) formation of solute-depleted bainite which results in a drastic depression in martensitic transformation temperatures and loss of the shape memory capacity, accompanied by the atomic disordering in both the remaining parent phase and bainite; and (3) precipitation of the equilibrium cu and gamma(2) phases and destruction of the shape memory capacity.
部门归属	dalian univ technol,dept mat engn,dalian 116024,peoples r china. acad sinica,inst met res,atom imaging solids lab,shenyang 110015,peoples r china. city univ hong kong,ctr mat sci,kowloon,hong kong.
关键词	Zn-al Alloys Cu-al Martensitic-transformation Bainitic Transformation Lattice-parameters Atomic Order Ni Alloys Ti Alloy Phase Mn
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38141
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. G. Wei,H. Y. Peng,W. H. Zou,et al. Aging effects in a Cu-12Al-5Ni-2Mn-1Ti shape memory alloy[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,1997,28(4):955-967.
APA	Z. G. Wei,H. Y. Peng,W. H. Zou,&D. Z. Yang.(1997).Aging effects in a Cu-12Al-5Ni-2Mn-1Ti shape memory alloy.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,28(4),955-967.
MLA	Z. G. Wei,et al."Aging effects in a Cu-12Al-5Ni-2Mn-1Ti shape memory alloy".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 28.4(1997):955-967.