Search Results 1-20 of 1939

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1

Creep Damage Assessment of Gr.91 Steel Welds by UPA Method [in Japanese]

SHIODA Yoshiki , SAITO Noriko , TANOUE Tatsuro , NOMURA Kyohei , KUBUSHIRO Keiji

… All creep specimens ruptured at heat affected zone (HAZ). … The UPA indication was recognized near HAZ of the root part at creep life ratio of about 0.7. … Also, creep voids were initiated at recovery area of microstructure near HAZ of the root part. …

Journal of the Society of Materials Science, Japan 70(2), 177-183, 2021

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2

Spot-Welded Tensile Properties in Automobile Ultrahigh-Strength TRIP-Aided Martensitic Steel Sheet

Nagasaka Akihiko , Hojo Tomohiko , Aoki Katsuya , Koyama Hirofumi , Shimizu Akihiro

… Effect of heat-affected zone (HAZ) softening on tensile strength (TS) and total elongation (TEl) of spot-welded automobile ultrahigh strength TRIP-aided martensitic (TM) steel sheet was investigated for automobile applications. …

ISIJ International 61(2), 599-607, 2021

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3

Effect of Hydrogen on Spot Welded Tensile Properties in Automotive Ultrahigh Strength TRIP-aided Martensitic Steel Sheet [in Japanese]

Nagasaka Akihiko , Hojo Tomohiko , Aoki Katsuya , Koyama Hirofumi , Shimizu Akihiro , Zolkepeli Zulhafiz Bin , Shibayama Yuki , Akiyama Eiji

… It was considered that this is partly due to effect of stress concentration on heat affected zone (HAZ) softening of hardness distribution of spot weld. …

Tetsu-to-Hagane 107(2), 175-184, 2021

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4

Modelling of Hydrogen Diffusion in a Weld Cold Cracking Test: Part 2, Numerical Calculations

Kasuya Tadashi , Yokobori A. Toshimitsu , Ozeki Go , Ohmi Toshihito , Enoki Manabu

… We firstly conducted a y groove weld cracking test using 980 MPa grade steel and 780 MPa grade welding consumable to observe HAZ cracking. … The calculation results of the under-match case show that hydrogen tends to accumulate in the stress concentration area of both the HAZ and the weld metal, which indicates crack may occur in both the HAZ and the weld metal. …

ISIJ International, 2021

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RELATIONSHIP OF WELDED JOINTS AND TENSILE STRENGTH OF HAZ ON ELECTRO-SLAG WELD ZONE BETWEEN INTERIOR DIAPHRAGM AND BOX COLUMN [in Japanese]

藤沢清二 , 石井匠 , 下川弘海 , 原田幸博 , 梅田敏弘 , 荒木田椋太 , 森田耕次

鋼構造論文集 27(107), 23-32, 2020-09
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Creep Damage Assessment of Welded Joint of Boiler Piping by Hydrogen Thermal Desorption Analysis [in Japanese]

村上幸太郎 , 駒崎慎一 , 田淵正明 , 本郷宏通

ボイラ研究 = Journal of Japan Boiler Association (419), 11-16, 2020-02
7

Pathway Analysis of Growth Faltering Pattern Based on Height for Age in Children Under Five in Indonesia Based on Indonesian National Health Survey 2013

KUSRINI Ina , MULYANTORO Donny Kristanto , SUPADMI Sri

… The mean height for age z-score (HAZ) has declined in linear patterns among the first five years of life. … In children <36 mo, the nutrition status of the mother has a direct and indirect effect on the birth nutrition status with r 0.17, while low birth weight, breastfeeding status, infectious disease, and immunization are the direct factor to HAZ score. …

Journal of Nutritional Science and Vitaminology 66(Supplement), S244-S250, 2020

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8

Microstructural Damage Evaluation of Large Sized Creep Test Specimen Made from KA-STPA29 Steel Equivalent Material Thick Plate Weld Joint [in Japanese]

Tezuka Hideshi , Ito Takahisa , Tokoro Masaaki

… 火STPA29鋼相当材の厚肉溶接継手について，大型クリープ試験を実施し，HAZ細粒部のボイドの生成状況等を評価した。 …

THE THERMAL AND NUCLEAR POWER GENERATION CONVENTION COLLECTED WORKS 70(2), 24-30, 2020

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9

Effect of chromium depletion layer at grain boundary on microbiologically influenced corrosion sensitivity of the heat affected zone in SUS304 steel [in Japanese]

井上有人 , 西川聡 , 八代仁 , 伊藤菜々子 , 尾花望 , 野村暢彦 , 川村将也 , 宮野泰征

… SUS304鋼の再現HAZ材および熱処理材を用いて，FT01による微生物腐食感受性に及ぼす粒界クロム欠乏層の影響を調査した．再現HAZ材は受入れのままと比較して粒界クロム欠乏層の形成がわずかであるにも関わらず,微生物腐食感受性は耐粒界腐食性が大きく低下した熱処理材と同等であった．したがって，SUS304鋼HAZのようなわずかなクロム欠乏層の形成でも，微生物腐食感受性を上昇 …

Preprints of the National Meeting of JWS 2020f(0), 88-89, 2020

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10

Low temperature linear friction welding of high strength steel to suppress HAZ softening [in Japanese]

AOKI Yasuhiro , USHIODA Kohsaku , FUJII Hidetosh

… HAZ軟化の抑制が困難な高強度鋼板をおいて低温LFWを行った。 … 印加圧力を増加させることで、低温での接合を行うことが可能となり、HAZ軟化を抑制したLFW継手を得ることに成功した。 …

Preprints of the National Meeting of JWS 2020f(0), 68-69, 2020

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11

Suppression of HAZ softening of aluminum joint by low temperature linear friction welding [in Japanese]

LI Weihao , MORISADA Yoshiaki , AOKI Yasuhiro , FUJII Hidetoshi

… 本研究では、線形摩擦接合中の印加圧力を制御することで、加工硬化による純アルミニウムA1050-H24及び析出強化によるアルミニウム合金A7075-T6の接合部におけるHAZ軟化の抑制を試みた。 …

Preprints of the National Meeting of JWS 2020f(0), 144-145, 2020

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12

Mechanism of HAZ softening suppression by addition of V and Mo in friction stir welded Si-Mn carbon steel [in Japanese]

WU Zexi , USHIODA Kohsaku , FUJII Hidetoshi

… Si-Mn炭素鋼のFSW継手の母材と撹拌部は、優れた強度·延性バランスを有するが、マルテンサイトの焼戻しによるHAZ軟化が生じる。 … そこで本研究では、VおよびMoをSi-Mn炭素鋼にそれぞれ添加しFSW継手を作製し、HAZ軟化抑制に与える影響を調査した。 … これら元素の添加によるHAZ軟化抑制を確認し、極めて微細な析出物の形成に起因すると考えた。 …

Preprints of the National Meeting of JWS 2020f(0), 100-101, 2020

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13

Dominant Factors of Cryogenic Toughness of Heat Affected Zone of Welding in High Mn Austenitic Steel [in Japanese]

UEDA Keiji , IZUMI Daichi , TAKADA Atsushi , ISHIDA Toshinori , IGI Satoshi , YAMASHITA Shotaro , OGURA Tomo , SAIDA Kazuyoshi

… In order to clarify the factors governing the cryogenic toughness of heat affected zone (HAZ) of welds, investigation of relationship between microstructure and Charpy impact toughness of multi-pass weld joint and a simulated thermal cycle test was conducted for high Mn steel containing 0.5%C-25%Mn-5%Cr.In the MAG welding, HAZ near fusion line showed high absorbed energy, whereas it was minimized at HAZ5mm reheated up to around 1073K. …

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 38(4), 211-221, 2020

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14

Microstructure and its hardness estimation of resistance spot weld of ultra-high strength steel sheets:– Development of resistance spot welding with pulsed current pattern for ultra-high strength steel sheets – [in Japanese]

MATSUDA Hiroshi , TANIGUCHI Koichi , IKEDA Rinsei , OI Kenji

… the reduction of solidification segregation in the nugget and the appropriate softening of the heat affected zone (HAZ). … Properly widened and softened HAZ would lead to large plastic deformation, which could reduce stress concentration at the edge of the nugget on the faying interface and prevent brittle fracture in the nugget during straining. …

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 38(4), 234-242, 2020

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15

Interface Characteristics of GCr15/45 Carbon Steel Composite Billet Produced by Electroslag Remelting Cladding

Cao Yulong , Li Guangqiang , Jiang Zhouhua , Dong Yanwu , Zhao Zhengrong , Niu Chenrui

… Based on the temperature variation characteristics of the composite system, the bonding state of the bimetals (interface) changes gradually from entrapped slag defect to metallurgical bonding at the early stage of ESRC process, and the widths of elements transition and heat-affected zone (HAZ) become proportional to the composite height. …

MATERIALS TRANSACTIONS 61(11), 2228-2235, 2020

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16

Microstructure and Mechanical Properties of Simulated Heat Affected Zone of Laser Welded Medium-Mn Steel

Cao Yang , Zhao Lin , Peng Yun , Song Liang , Zhong Minlin , Ma Chengyong , Tian Zhiling

… The microstructure, microhardness, and tensile properties of both base metal (BM) and simulated heat-affected zone (HAZ) were investigated. … The results show that the peak temperature (PT) of different regions in HAZ results in differences of microstructure and mechanical properties. … The change of PT has significant influence on microstructure and mechanical properties of HAZ. …

ISIJ International 60(10), 2266-2275, 2020

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17

New Joining Methods for (Iron-Based) Automotive Materials: ISMA-Results [in Japanese]

FUJII Hidetoshi

JOURNAL OF THE JAPAN WELDING SOCIETY 89(6), 425-429, 2020

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18

Advanced Technologies for Spot Weld Fracture Prediction in Automotive Steel Sheets [in Japanese]

AITO Takahiro , HAMADA Koichi , YONEMURA Shigeru , NIWA Toshiyuki

JOURNAL OF THE JAPAN WELDING SOCIETY 89(6), 416-419, 2020

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19

Spot Welded Tensile Properties in Automobile Ultrahigh Strength TRIP-aided Martensitic Steel Sheet [in Japanese]

Nagasaka Akihiko , Hojo Tomohiko , Aoki Katsuya , Koyama Hirofumi , Shimizu Akihiro

… Effect of heat-affected zone (HAZ) softening on tensile strength (TS) and total elongation (TEl) of spot welded ultrahigh strength TRIP-aided martensitic (TM) steel sheet was investigated for automobile applications. …

Tetsu-to-Hagane 106(7), 438-447, 2020

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20

Control of softened HAZ during linear friction welding of carbon steel [in Japanese]

AOKI Yasuhiro , FUJII Hidetoshi

… 自動車車体、部品に用いられる高強度鋼は、接合時のHAZ軟化による強度低下が問題とされる。 … 中炭素鋼S45Cを調質した高強度鋼を用いたLFWにおいて、印加応力を増加させることで接合温度を制御することで接合部周辺のHAZ抑制されることを示す。 …

Preprints of the National Meeting of JWS 2020s(0), 36-37, 2020

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