Study on constitutive relationship for TC11 titanium alloy with thick laths widmanstatten microstructures deformed in two phase field;

The stress relaxation behavior of Ti-6Al-4V alloy with widmanstatten microstructure at 200℃, 400℃ and 600℃ were investigated, and microstructures before and after stress relaxation were observed by TEM.

By comparing the ribbed bars with brittle fractures to the qualified rebars,it has been found that the widmanstatten structure,the rolling defects and the high inclusion are the major causes.

The results of metallographical analysis of cracks in welding seams,show that widmanstatten structure is usually unavoidable in the welding process; however some meassures should be paid to welding failures can be taken to weliminate or minimize its influence,and attention about the easily neglected factor, that due to environment temperature change.

The results show that the appearance of Widmanstatten structure,upper bainite and martensite in the structure of 20MnSi HRB is the main cause making the yield point disappear.

Based on the investigation of remaining clan organizations in Qinglong village and an comparative study of related documents and records and the villagers oral historical materials,this paper reveals the characteristics of the clan organization which only can be found in modern society-sustainability,implication and deformation.

The clan organization unified consanguinity, geographical relationship and sentiment in this course.

The Villager s autonomy system is being perused in our whole country while the remaining clan organizations of various nationalities must cause various negative effects on this system, in particular the formation of the clan force based on clan s schism which may bring serious endangering to countryside social stability and regime construction.

China is pursuing villager s autonomy system in the whole country,and various nationalities surviving religious organizations should cause various negative effects to this system.

This article probes on the negative effects of surviving religious organizations to system of villagers autonomy, The author holds we should strengthen construction of villages autonomy from levels of law, economics, self-construction and social culture.

It is necessary for us to set up a series of national cultures and spirits which has human accomplishment in order to eliminate the family organization and the local evil force from a village and keep a village order.

This paper,through analysing affacks and causes which family organization met with,reveals political and economic changes of family organization during the period of four social reforms (land reform,socialist transform,people s commune movement,rural reform)after the foundiing of P R China,and such changes influence to decrease and increase family organ.