中南大学学报（英文版）
中南大學學報（英文版）
중남대학학보（영문판）
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY(ENGLISH EDITION)
2015年
2期
416-421
,共6页
刘娜%李周%李灵%刘斌%李擎天%徐根应
劉娜%李週%李靈%劉斌%李擎天%徐根應
류나%리주%리령%류빈%리경천%서근응
CuAlMnZnTiB shape memory alloy%mechanical properties%free-cutting
The mechanical properties and cutting performance of the designed CuAlMnZnTiB shape memory alloy were studied by tensile test and microstructure observation. Using X-ray diffractometry, differential scanning calorimetry (DSC) and semi-quantitative shape memory effect test, the microstructure and shape memory effect were analyzed. It is found that lots ofβ phase and fewα phase are formed in the quenching of Cu-7.5Al-9.7Mn-3.4Zn-0.3Ti-0.14B (mass fraction, %) alloy, a great deal of martensite and fewα phase are formed in the aging alloy, while the annealing alloy is composed of a great deal ofα phase and fewβ phase. The tensile strength and elongation of the annealed alloy are 649 MPa and 17.1%, respectively. Some tiny and dispersion distributed second phase particles are generated in Ti and B precipitates, greatly improving the alloy machinability.
