中国铸造装备与技术
中國鑄造裝備與技術
중국주조장비여기술
China Foundry Machinery & Technology
2015年
3期
47-49
,共3页
贺雷%柳伟%宗喜梅%许春香%牛晓峰%张金山
賀雷%柳偉%宗喜梅%許春香%牛曉峰%張金山
하뢰%류위%종희매%허춘향%우효봉%장금산
Mg-Gd-Cu%长周期有序堆垛结构%热处理%微观组织%力学性能
Mg-Gd-Cu%長週期有序堆垛結構%熱處理%微觀組織%力學性能
Mg-Gd-Cu%장주기유서퇴타결구%열처리%미관조직%역학성능
Long period stacking ordered structure%Heat treatment%Microstructures%Mechanical properties
通过常规金属型铸造方法制备了Mg96Gd3Cu1(a%)合金。利用光学显微镜、X射线衍射仪、扫描电子显微镜和力学性能试验机等对合金的铸态和热处理态显微组织及力学性能进行了系统的分析。研究结果显示，铸态的合金中形成了14H类型的长周期堆垛有序结构相，固溶处理时，合金晶界处的Mg5Gd相溶解并析出层片状的14H长周期结构相。时效处理后合金性能得到较大的提高。
通過常規金屬型鑄造方法製備瞭Mg96Gd3Cu1(a%)閤金。利用光學顯微鏡、X射線衍射儀、掃描電子顯微鏡和力學性能試驗機等對閤金的鑄態和熱處理態顯微組織及力學性能進行瞭繫統的分析。研究結果顯示，鑄態的閤金中形成瞭14H類型的長週期堆垛有序結構相，固溶處理時，閤金晶界處的Mg5Gd相溶解併析齣層片狀的14H長週期結構相。時效處理後閤金性能得到較大的提高。
통과상규금속형주조방법제비료Mg96Gd3Cu1(a%)합금。이용광학현미경、X사선연사의、소묘전자현미경화역학성능시험궤등대합금적주태화열처리태현미조직급역학성능진행료계통적분석。연구결과현시，주태적합금중형성료14H류형적장주기퇴타유서결구상，고용처리시，합금정계처적Mg5Gd상용해병석출층편상적14H장주기결구상。시효처리후합금성능득도교대적제고。
Mg96Gd3Cu1 (a%) alloy was prepared by conventional metal mold casting. The microstructures and mechanics properties of as-cast and heat treated alloys were investigated by means of optimal microscope (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM) and electronic universal material test machine. The results indicated that 14H long period stacking ordered (LPSO) phase formed in as-cast alloy. During the solid solution treatment, Mg5Gd phase located on the grain boundary was dissolved and a new lamellar 14H LPSO was precipitated. The mechanical properties were improved obviously after the aging treatment.
