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Ti8LC低成本钛合金疲劳裂纹扩展行为研究 曾卫东1,段风川2,周义刚1,王焱2,贾蔚菊1 (1.西北工业大学,凝固技术国家重点实验室,陕西,西安,710072;2.一航红原锻铸工业公司,陕西,三原,713801) 摘要:采用双重退火对Ti8LC低成本钛合金进行热处理,测试其拉伸性能,并对其疲劳裂纹扩展行为进行研究,探索其疲劳断裂机制.结果表明,提高双重退火的第1次退火温度,强度略有升高,塑性降低.da/dN试样断口3个区特征明显:预裂区为解理断裂机制.稳态扩展区裂纹以条纹循环机制向前扩展,同时能观察到很多二次裂纹.快速扩展区的断口呈韧窝型断裂特征.该合金的疲劳裂纹扩展速率对退火温度不敏感. 关键词:低成本钛合金; 断裂韧性; 疲劳裂纹扩展速率; low cost titanium alloy; fracture toughness; fatigue crack......
Ti8LC钛合金热处理工艺对硬度和组织的影响张津,刘贞阳,郭海明北京科技大学新材料技术研究院摘 要:钛合金Ti8LC是一种新型低成本近α型的钛合金,为了研究该合金热处理对其组织结构的影响规律,对其进行不同温度固溶处理,随后在不同温度进行时效热处理.用金相显微镜和扫描电镜观察了不同热处理工艺下的微观组织形貌,并通过能谱分析了不同工艺下元素的含量变化.采用洛氏硬度计测试了试样的平均硬度,分析了固溶温度和时效温度对其微观组织形态的变化影响,以及硬度大小,微观组织结构中相的形态和组织组成的相关性.结果表明:固溶处理温度对Ti8LC固溶后的显微组织及随后的时效组织都有极大的影响,随固溶温度的升高,由片状逐渐转为块状.经相同时效工艺处理的合金其显微组织受固溶后组织的遗传影响,合金的硬度随着固溶温度的升高,先降低后......
Ti8LC钛合金材料切削过程的有限元仿真及性能试验张帷1,康凤1,2,胡传凯1,2,舒大禹1,2,宁海青1,21. 中国兵器工业第五九研究所2. 国防科技工业精密塑性成形研究应用中心摘 要:钛合金材料的各种特点决定了其难切削的加工性能,针对一种低成本钛合金Ti8LC材料进行了切削加工性能的试验研究.运用有限元法,再现了钛合金切削加工过程,得出了切削参数对主切削力及进给抗力的影响规律,结果表明,随着切削深度的增加,主切削力和进给抗力均有大幅增长,而进给量对切削力的影响不大.而通过进一步的切削加工试验,分析了不同切削速度,进给速度,进给量等工艺参数对钛合金切削加工时的主切削力,进给抗力等的影响,结果表明,由于实际切削中的刀具磨损问题,切削力较仿真切削力大许多.因此,采用目前的涂层硬质合金刀具,该钛合金材料......
The Strengthening of Cu-15Ni-8Sn Alloy WANG Ming-Pu1,WANG Yan-hui1,HONG Bin1 (1.School of Material Science and Engineering, Central South University, Changsha China) 摘要:The microstructure, property and relation between them of Cu-15Ni-8Sn alloy are studied by means of TEM and the measurement of hardness. The results show that γ '' metastable phase strengthens alloy because of its ordering......
The Technological Improvements of Aluminum Alloy Coloring by Electrolysis LI Nai-jun1 (1.Teachers College, Shenyang University, Shenyang 110015, P. R. China) 摘要:The technological process of coloring golden-tawny on aluminum alloy by electrolysis was improved in this paper. The optimum composition of electrolyte was found, the conditions of deposition and anodic oxidation by electrolysis were......
Microstructure and Performances of Nanocrystalline Zinc-nickel Alloy Coatings LI Guang-yu1,NIU Li-yuan1,JIANG Zhong-hao1,LIAN Jian-she1 (1.The Key Lab of Automobile Materials, Ministry of Education, China, College of Materials Science and Engineering, Jilin University, Nanling Campus, Changchun, 130025, China) 摘要:Nanocrystalline zinc-nickel alloy coatings were deposited from an alkaline......
Alloy 20不锈钢薄板等离子弧焊接工艺研究赵斌,王宾宾,王小华中国船舶重工集团公司第七二五研究所摘 要:对Alloy 20不锈钢薄板进行了等离子弧焊接工艺试验研究.结果表明,采用等离子弧焊接方法,ERCr Ni Mo-3焊材及合理的焊接工艺参数,等离子弧焊接工艺可用于Alloy 20不锈钢薄板的焊接,焊接接头各项性能均能满足要求.关键词:Alloy 20;不锈钢薄板;等离子弧焊接;......
)Abstract:Stainless die with micro-groove and micro-hole have been designed and manufactured, which has been used to study superplastic microforming of 2091Al-Li alloy by means of superplastic forming... micro-rib specimen, behavior of material could be understood well.Key words:superplasticity; microforming; extrusion; 2091Al-Li alloy......
Trans. Nonferrous Met. Soc. China 22(2012) s656-s660 Microforming of superplastic 5083 aluminum alloy Md. Abu Mowazzem HOSSAIN1, Sung-Tae HONG1, Kyu-Yeol PARK1, Young-Sang NA2 1. School of Mechanical...: The mechanical behavior of superplastic 5083 aluminum alloy during microforming process was investigated by finite element analysis. A micro V-groove die was modeled to analyze the effects of forming......
Study on Thermomagnetic Treatment Fe-25.5Cr-12Co Permanent Magnetic Alloy Zhen Liang1,GAO Run-sheng2,ZHU Dan-yang1,SUN Xue-yin1,SHAO Wen-zhu1,XU Ren-gen1 (1.Technology and Development Centre... Fe-25.5Cr-12Co alloy by different process of thermomagnetic treatment were investigated. It is found that magnetic properties are sensitive to parameters of thermomagnetic treatment process in magnetic......
