[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-147770-105":59,"doc-detail-147770-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","historical-aspect-of-shot-peening-article-overview","HISTORICAL ASPECT OF SHOT PEENING - Article Overview","","Shot peening is traced through a historical arc from blacksmithing origins to modern industrial use, then to future expectations. The paper links early practices such as sword strengthening and descaling to present applications in aircraft and automotive components, emphasizing fatigue strength, wear reduction, and surface-related tribological and damping effects. Future sections address incomplete understanding of causes and mechanisms, highlighting residual stress, work hardening, and the evolving role of improved metal quality and atomic-industry requirements.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/historical-aspect-of-shot-peening-article-overview/147770/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/historical-aspect-of-shot-peening-article-overview/147770.png","ImageObject",300,407,{"name":92,"@type":93},"Bill Black","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-22","2026-08-26",true,{"@type":102,"interactionType":103,"userInteractionCount":52},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What historical period framework does the paper use for shot peening?","Question",{"text":112,"@type":113},"The paper divides shot peening into three periods: past, now, and future.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How did blacksmiths use shot peening in the past?",{"text":117,"@type":113},"Blacksmiths used it for descaling and for strengthening swords by repeatedly peening after hot forging.",{"name":119,"@type":110,"acceptedAnswer":120},"Why are peening effects not fully understood, according to the future section?",{"text":121,"@type":113},"The paper states that causes and mechanisms are not always clear; even after accounting for residual stress and work hardening, some effects may remain.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},147770,1787769271,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":52,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":19,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":52,"preview_page_count":4},24189269381491,"https://ap-avatar.wpscdn.com/avatar/160000cf11732dd8392?x-image-process=image/resize,m_fixed,w_180,h_180&k=1788146458752108895","# HISTORICAL ASPECT OF SHOT PEENING\n\nKisuke lida  \nMechanical Engg.Dept.Meiji University,Higashimita,Tama,Kawasaki,Japan.  \n## 1.INTRODUCTION\n\nShot Peening technique have been used in the world.In this paper,fromhistorical aspect the term was divided into three i.e.past,now and future asshown in Fig.1 and main techniques was picked up.  \nPAST  \nFig.1.Shot Peening:Past,Now and Future  \n## 2.PAST\n\nLong time ago,shot peening was used by blacksmiths as a technique fordescaling or as a strengthening method of sword in the Occident and Asia.Descaling is aplane technique for blacksmiths,which was easilyperformable,but strengthening of sword may rather be a high technique.After hot forging,a blacksmith repeatedly peenedasword by apointed hammerto make it morestrong.  \nInJapan,the name of Japanese swordis Katanaor Nihontoh,as shownin Fig.2,and it was worn by Samurai persons until 19th century as traditional weapon.But samurai and this custom was finished by the revolution in 1868.  \nFig.2.Japanese Sword:Katana or Nihontoh  \nIn the production of the katana,a blacksmith performed a technique named'Mizuuchi'or 'Kuro-uchi'.This technique was hammering after quenching.'Mizu-uchi'means hammering on sword-work wetted by water and the 'kuro-uchi'means hammering on black sword-work covered with black scale:'mizu'means water,'kuro'means black,'uchi'means hammering.This hammeringproduces transformationof austenite remainingafterquenchingandmakes theSword more hard.  \nFig.3.Blacksmith in Japan (10-19 century)  \n## 3.NOW\n\nAs well known,shot peening is used in various fields,and the main industriesare shown in Fig.1.  \nIn aircraft production,all parts are peened to increase fatigue strength.In  \nEffect  \nDescalingPeen-formingDimple effectTribology effect(I)Heat transfer rate increase  \n## 4.FUTURE\n\nautomobile production,stearing parts,all springs and main gears are peenedto increase fatigue strength and to prolong wear,and to produce light weightcar.  \nInotherproduction,welding,die-casting and forging etc.,allorseveralproductsare peened for various purposes.  \nPeening effects and its causes are shown in Fig.4,produced from peenedsurface and affected layer.  \nCause  \nSurface roughnessDent.Small eddyOil potStretch strainImpact  \nEffectCauseIncrease fatigue strengthResidual compressive stressSCC.Corrosion protectionWork hardeningTribology effect(I)Work softeningIncrease cutting tool lifeMartensitic transformationDamping effectGrain boundary close  \nFig.4.Peening Effect and Cause  \nPeening effects are not yet fully understood,because its causes and itsmechanisms are notalways clear.The maincauses are residualstress and work  \nhardening,but after removing these two factors,some peening effects areremained.  \nThe quality of metals may be getting better after several years further,thenvarious peening effects may appearon them,Before ten years,residual stresswas not appreciated inincreasing fatigue strength owing to involved impuritiesin steels and other metals,therefore fatigue strength was not constant.Inatomicindustry,constructional metals are almost stainless steels,and increaseof endurance limit or resistance of stress corrosion cracking(scc)are veryimportant factors.Shot peenngis themost effectiveprocessforthem.Stainlesssteels produce highly compressive residual stress by shot peening whichendure from relaxation by heating.But shot peenig effect for atomic energyendure from relaxation by heating.However,shot peening effect for atomicenergy apparatus is not well known yetforpersons concerned,therefore,maybe available in the future.In metal mould industry,metal quality is low andtherefore peening effects don't appear on them.The quality may increase infuture,and shot peening may be useful.","cbCailrMQeJo4w8X","https://ap.wps.com/l/cbCailrMQeJo4w8X","pdf",74191,"English","# 1. INTRODUCTION\n# 2. PAST\n## Japanese sword production and peening methods\n# 3. NOW\n## Main industries and effects\n# 4. FUTURE\n## Peening effects, causes, and unresolved mechanisms","[{\"question\":\"What historical period framework does the paper use for shot peening?\",\"answer\":\"The paper divides shot peening into three periods: past, now, and future.\"},{\"question\":\"How did blacksmiths use shot peening in the past?\",\"answer\":\"Blacksmiths used it for descaling and for strengthening swords by repeatedly peening after hot forging.\"},{\"question\":\"Why are peening effects not fully understood, according to the future section?\",\"answer\":\"The paper states that causes and mechanisms are not always clear; even after accounting for residual stress and work hardening, some effects may remain.\"}]","HISTORICAL ASPECT OF SHOT PEENING - Article Overview | PDF"]