Thirdly, with the modified Gurson model of the MARC finite element method soft, the damage behave of the welded joint was simulated. It was found that in the undermatched welded joint, the damage mainly happened in the soft weld line and with the decrease of the weld line抯 width, the damage抯 development was faster. As for the overmatched welded joint, the results showed that the damage mainly happened in the soft base metal and with the increase of the weld line抯 width, the damage抯 development was faster. While the width of the weld line was narrower than three millimeters, the high strength weld line could improve the anti-damage capability of the overmatched welded joint.

通過(guò)計(jì)算發(fā)現(xiàn)在低匹配的焊接接頭中www.狼友视频网站，損傷主要發(fā)生在低強(qiáng)度的焊縫中午夜视频福利免费，并且焊縫寬度越小国产激情高清视频，焊接接頭的損傷就越嚴(yán)重午夜人人操；而在高匹配的焊接接頭中岛国电影网站，損傷主要發(fā)生在緊臨焊縫的強(qiáng)度較低的母材上黄色a,亚洲a，隨高強(qiáng)度焊縫寬度的增加，焊接接頭的損傷發(fā)展程度加劇久久久久精品免费网播放，當(dāng)焊縫寬度小于3mm時(shí)日韩中文欧美在线，高強(qiáng)度焊縫的加入對(duì)焊接接頭能起一個(gè)強(qiáng)化的作用，提高了焊接接頭的抗損傷能力毛片三级片网站小视频。

The research results indicate that the interface between weld and l2Crl MoV steel is the weakest part of welded joint. However ,the interfacial failure tendency of low match welded joint is less than those of medium and high match welded joint.

試驗(yàn)結(jié)果表明91精品国产免费，焊前預(yù)熱250℃，焊后回火750℃×1h黄片免费观看无码，加速模擬運(yùn)行500h后最新最近亚洲中文字幕，高匹配和中匹配接頭的力學(xué)性能劣化明顯，界面蠕變損傷及失效傾向較大91色色福利视频；而低匹配接頭的力學(xué)性能優(yōu)于高匹配和中匹配接頭在线观看视频免费网站黄，界面蠕變損傷較輕，失效傾向較小欧美性色欧美A在线观看。

This paper studies the effect of consequent post heat treatment on the mechanical property and shape memory ratio of the welded TiNi joints in TiNi shape memory alloy precise pulse resistance butt welding,analyzes the joint structures and fractographies affecting mechanical property and shape memory ratio of welded joint by using strength testing, SEM and TEM, gets the optimum welding parameters obtaining good shape recovery ratio welded joint, and has discovered the inherent reason for proper consequent post heat treatment to promote the joint shape recovery ratio from microcosmic point.

摘 要：采用拉伸測(cè)試特黄一级乱淫A片、SEM、TEM和定點(diǎn)成分能譜分析等手段研究了隨機(jī)后熱處理對(duì)TiNi形狀記憶合金精密脈沖電阻對(duì)焊焊接接頭力學(xué)性能三级片在线无码、形狀恢復(fù)率的影響久久免费网址，并對(duì)影響接頭力學(xué)性能和形狀恢復(fù)率的接頭組織和形貌進(jìn)行了研究，得出了獲得具有較高形狀恢復(fù)率接頭的焊接參數(shù)日韩中文福利片观看，從微觀角度揭示了隨機(jī)后熱處理提高接頭形狀恢復(fù)率的內(nèi)在原因最新中文字幕在线视频网站，為TiNi形狀記憶合金的開發(fā)和應(yīng)用提供了基礎(chǔ)，具有重大的理論和實(shí)際應(yīng)用價(jià)值a黄大片久久网。

welded joint：焊縫

welded digester 焊接蒸煮鍋 | welded joint 焊縫 | welding 焊接

welded joint：熔合接頭

welded electronic circuit 焊接的電子電路 | welded joint 熔合接頭 | welded junction 焊口

notch break test for butt welded joint：對(duì)接接頭缺口斷裂試驗(yàn)

manhole with common welded flange平焊法蘭人孔 | notch break test for butt welded joint對(duì)接接頭缺口斷裂試驗(yàn) | notched and welded wide plate test缺口焊接寬板試驗(yàn)